[ 
https://issues.apache.org/jira/browse/SOLR-14669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17169988#comment-17169988
 ] 

Jörn Franke commented on SOLR-14669:
------------------------------------

sorry for the late response. I confirm it is ZK 3.6.1 and Solr 8.6. It is a ZK 
ensemble, problem does not occur in standalone mode.

 

leader
{code:java}
zk_version      3.6.1--104dcb3e3fb464b30c5186d229e00af9f332524b, built on 
04/21/2020 15:01 GMT
zk_server_state leader
zk_peer_state   leading - broadcast
zk_ephemerals_count     35
zk_num_alive_connections        7
zk_avg_latency  0.5851
zk_min_proposal_size    36
zk_outstanding_requests 0
zk_znode_count  790
zk_global_sessions      9
zk_last_client_response_size    158
zk_packets_sent 1250378
zk_packets_received     1250220
zk_max_proposal_size    1455
zk_max_client_response_size     36345565
zk_synced_followers     2
zk_connection_drop_probability  0.0
zk_watch_count  65
zk_synced_non_voting_followers  0
zk_synced_observers     0
zk_min_latency  0
zk_max_file_descriptor_count    65000
zk_approximate_data_size        488437179
zk_open_file_descriptor_count   74
zk_last_proposal_size   116
zk_pending_syncs        0
zk_leader_uptime        958675220
zk_local_sessions       0
zk_uptime       958676361
zk_max_latency  4744
zk_outstanding_tls_handshake    0
zk_learners     2
zk_min_client_response_size     16
zk_quorum_size  3
zk_proposal_count       304
zk_outstanding_changes_removed  411
zk_stale_requests_dropped       0
zk_large_requests_rejected      0
zk_connection_rejected  0
zk_sessionless_connections_expired      1
zk_looking_count        1
zk_dead_watchers_queued 0
zk_stale_requests       0
zk_connection_drop_count        1
zk_learner_proposal_received_count      0
zk_digest_mismatches_count      0
zk_dead_watchers_cleared        0
zk_response_packet_cache_hits   873109
zk_bytes_received_count 56311917
zk_add_dead_watcher_stall_time  0
zk_request_throttle_wait_count  0
zk_response_packet_cache_misses 1126
zk_ensemble_auth_success        0
zk_prep_processor_request_queued        1257581
zk_learner_commit_received_count        0
zk_stale_replies        0
zk_connection_request_count     12
zk_ensemble_auth_fail   0
zk_diff_count   2
zk_response_packet_get_children_cache_misses    0
zk_connection_revalidate_count  6
zk_quit_leading_due_to_disloyal_voter   0
zk_snap_count   1
zk_unrecoverable_error_count    0
zk_commit_count 304
zk_stale_sessions_expired       5
zk_response_packet_get_children_cache_hits      0
zk_sync_processor_request_queued        304
zk_outstanding_changes_queued   411
zk_request_commit_queued        304
zk_ensemble_auth_skip   0
zk_tls_handshake_exceeded       0
zk_revalidate_count     7
zk_avg_node_created_watch_count 0.0
zk_min_node_created_watch_count 0
zk_max_node_created_watch_count 0
zk_cnt_node_created_watch_count 0
zk_sum_node_created_watch_count 0
zk_avg_session_queues_drained   1.0
zk_min_session_queues_drained   1
zk_max_session_queues_drained   1
zk_cnt_session_queues_drained   304
zk_sum_session_queues_drained   304
zk_avg_write_commit_proc_req_queued     7.0E-4
zk_min_write_commit_proc_req_queued     0
zk_max_write_commit_proc_req_queued     5
zk_cnt_write_commit_proc_req_queued     1242288
zk_sum_write_commit_proc_req_queued     829
zk_avg_connection_token_deficit 0.0
zk_min_connection_token_deficit 0
zk_max_connection_token_deficit 0
zk_cnt_connection_token_deficit 12
zk_sum_connection_token_deficit 0
zk_avg_read_commit_proc_req_queued      1.0064
zk_min_read_commit_proc_req_queued      0
zk_max_read_commit_proc_req_queued      8
zk_cnt_read_commit_proc_req_queued      1242288
zk_sum_read_commit_proc_req_queued      1250250
zk_avg_node_deleted_watch_count 1.0
zk_min_node_deleted_watch_count 1
zk_max_node_deleted_watch_count 1
zk_cnt_node_deleted_watch_count 6
zk_sum_node_deleted_watch_count 6
zk_avg_startup_txns_load_time   17.0
zk_min_startup_txns_load_time   17
zk_max_startup_txns_load_time   17
zk_cnt_startup_txns_load_time   1
zk_sum_startup_txns_load_time   17
zk_avg_sync_processor_queue_size        0.0197
zk_min_sync_processor_queue_size        0
zk_max_sync_processor_queue_size        1
zk_cnt_sync_processor_queue_size        305
zk_sum_sync_processor_queue_size        6
zk_avg_follower_sync_time       0.0
zk_min_follower_sync_time       0
zk_max_follower_sync_time       0
zk_cnt_follower_sync_time       0
zk_sum_follower_sync_time       0
zk_avg_prep_processor_queue_size        0.0206
zk_min_prep_processor_queue_size        0
zk_max_prep_processor_queue_size        8
zk_cnt_prep_processor_queue_size        1257582
zk_sum_prep_processor_queue_size        25860
zk_avg_fsynctime        1.3087
zk_min_fsynctime        0
zk_max_fsynctime        28
zk_cnt_fsynctime        298
zk_sum_fsynctime        390
zk_avg_reads_issued_from_session_queue  0.4474
zk_min_reads_issued_from_session_queue  0
zk_max_reads_issued_from_session_queue  5
zk_cnt_reads_issued_from_session_queue  304
zk_sum_reads_issued_from_session_queue  136
zk_avg_snapshottime     1076.0
zk_min_snapshottime     1076
zk_max_snapshottime     1076
zk_cnt_snapshottime     1
zk_sum_snapshottime     1076
zk_avg_startup_txns_loaded      17.0
zk_min_startup_txns_loaded      17
zk_max_startup_txns_loaded      17
zk_cnt_startup_txns_loaded      1
zk_sum_startup_txns_loaded      17
zk_avg_reads_after_write_in_session_queue       0.4474
zk_min_reads_after_write_in_session_queue       0
zk_max_reads_after_write_in_session_queue       5
zk_cnt_reads_after_write_in_session_queue       304
zk_sum_reads_after_write_in_session_queue       136
zk_avg_requests_in_session_queue        1.6156
zk_min_requests_in_session_queue        1
zk_max_requests_in_session_queue        6
zk_cnt_requests_in_session_queue        744
zk_sum_requests_in_session_queue        1202
zk_avg_write_commit_proc_issued 1.0
zk_min_write_commit_proc_issued 1
zk_max_write_commit_proc_issued 1
zk_cnt_write_commit_proc_issued 304
zk_sum_write_commit_proc_issued 304
zk_avg_prep_process_time        0.1407
zk_min_prep_process_time        0
zk_max_prep_process_time        4744
zk_cnt_prep_process_time        1257581
zk_sum_prep_process_time        176892
zk_avg_pending_session_queue_size       1.023
zk_min_pending_session_queue_size       1
zk_max_pending_session_queue_size       3
zk_cnt_pending_session_queue_size       304
zk_sum_pending_session_queue_size       311
zk_avg_time_waiting_empty_pool_in_commit_processor_read_ms      0.0395
zk_min_time_waiting_empty_pool_in_commit_processor_read_ms      0
zk_max_time_waiting_empty_pool_in_commit_processor_read_ms      4
zk_cnt_time_waiting_empty_pool_in_commit_processor_read_ms      304
zk_sum_time_waiting_empty_pool_in_commit_processor_read_ms      12
zk_avg_commit_process_time      0.0111
zk_min_commit_process_time      0
zk_max_commit_process_time      5
zk_cnt_commit_process_time      1242288
zk_sum_commit_process_time      13829
zk_avg_dbinittime       2115.0
zk_min_dbinittime       2115
zk_max_dbinittime       2115
zk_cnt_dbinittime       1
zk_sum_dbinittime       2115
zk_avg_netty_queued_buffer_capacity     0.0
zk_min_netty_queued_buffer_capacity     0
zk_max_netty_queued_buffer_capacity     0
zk_cnt_netty_queued_buffer_capacity     0
zk_sum_netty_queued_buffer_capacity     0
zk_avg_election_time    31390.0
zk_min_election_time    31390
zk_max_election_time    31390
zk_cnt_election_time    1
zk_sum_election_time    31390
zk_avg_commit_commit_proc_req_queued    3.0E-4
zk_min_commit_commit_proc_req_queued    0
zk_max_commit_commit_proc_req_queued    2
zk_cnt_commit_commit_proc_req_queued    1242288
zk_sum_commit_commit_proc_req_queued    312
zk_avg_sync_processor_batch_size        1.0201
zk_min_sync_processor_batch_size        1
zk_max_sync_processor_batch_size        3
zk_cnt_sync_processor_batch_size        298
zk_sum_sync_processor_batch_size        304
zk_avg_node_children_watch_count        1.1864
zk_min_node_children_watch_count        1
zk_max_node_children_watch_count        4
zk_cnt_node_children_watch_count        59
zk_sum_node_children_watch_count        70
zk_avg_write_batch_time_in_commit_processor     0.3882
zk_min_write_batch_time_in_commit_processor     0
zk_max_write_batch_time_in_commit_processor     3
zk_cnt_write_batch_time_in_commit_processor     304
zk_sum_write_batch_time_in_commit_processor     118
zk_avg_read_commit_proc_issued  1.0061
zk_min_read_commit_proc_issued  0
zk_max_read_commit_proc_issued  8
zk_cnt_read_commit_proc_issued  1242288
zk_sum_read_commit_proc_issued  1249823
zk_avg_concurrent_request_processing_in_commit_processor        2.0
zk_min_concurrent_request_processing_in_commit_processor        1
zk_max_concurrent_request_processing_in_commit_processor        4
zk_cnt_concurrent_request_processing_in_commit_processor        10
zk_sum_concurrent_request_processing_in_commit_processor        20
zk_avg_node_changed_watch_count 1.9302
zk_min_node_changed_watch_count 1
zk_max_node_changed_watch_count 2
zk_cnt_node_changed_watch_count 43
zk_sum_node_changed_watch_count 83
zk_avg_sync_process_time        0.1053
zk_min_sync_process_time        0
zk_max_sync_process_time        2
zk_cnt_sync_process_time        304
zk_sum_sync_process_time        32
zk_avg_startup_snap_load_time   2045.0
zk_min_startup_snap_load_time   2045
zk_max_startup_snap_load_time   2045
zk_cnt_startup_snap_load_time   1
zk_sum_startup_snap_load_time   2045
zk_avg_prep_processor_queue_time_ms     0.0317
zk_min_prep_processor_queue_time_ms     0
zk_max_prep_processor_queue_time_ms     763
zk_cnt_prep_processor_queue_time_ms     1257581
zk_sum_prep_processor_queue_time_ms     39864
zk_p50_prep_processor_queue_time_ms     0
zk_p95_prep_processor_queue_time_ms     0
zk_p99_prep_processor_queue_time_ms     1
zk_p999_prep_processor_queue_time_ms    1
zk_avg_close_session_prep_time  0.1538
zk_min_close_session_prep_time  0
zk_max_close_session_prep_time  1
zk_cnt_close_session_prep_time  13
zk_sum_close_session_prep_time  2
zk_p50_close_session_prep_time  0
zk_p95_close_session_prep_time  1
zk_p99_close_session_prep_time  1
zk_p999_close_session_prep_time 1
zk_avg_read_commitproc_time_ms  0.0627
zk_min_read_commitproc_time_ms  0
zk_max_read_commitproc_time_ms  45
zk_cnt_read_commitproc_time_ms  1249959
zk_sum_read_commitproc_time_ms  78388
zk_p50_read_commitproc_time_ms  0
zk_p95_read_commitproc_time_ms  1
zk_p99_read_commitproc_time_ms  1
zk_p999_read_commitproc_time_ms 1
zk_avg_updatelatency    5.2763
zk_min_updatelatency    1
zk_max_updatelatency    34
zk_cnt_updatelatency    228
zk_sum_updatelatency    1203
zk_p50_updatelatency    4
zk_p95_updatelatency    15
zk_p99_updatelatency    22
zk_p999_updatelatency   34
zk_avg_local_write_committed_time_ms    0.1941
zk_min_local_write_committed_time_ms    0
zk_max_local_write_committed_time_ms    5
zk_cnt_local_write_committed_time_ms    304
zk_sum_local_write_committed_time_ms    59
zk_p50_local_write_committed_time_ms    0
zk_p95_local_write_committed_time_ms    1
zk_p99_local_write_committed_time_ms    4
zk_p999_local_write_committed_time_ms   5
zk_avg_readlatency      0.5842
zk_min_readlatency      0
zk_max_readlatency      4744
zk_cnt_readlatency      1249959
zk_sum_readlatency      730248
zk_p50_readlatency      1
zk_p95_readlatency      1
zk_p99_readlatency      1
zk_p999_readlatency     2
zk_avg_quorum_ack_latency       3.9572
zk_min_quorum_ack_latency       1
zk_max_quorum_ack_latency       32
zk_cnt_quorum_ack_latency       304
zk_sum_quorum_ack_latency       1203
zk_p50_quorum_ack_latency       3
zk_p95_quorum_ack_latency       12
zk_p99_quorum_ack_latency       20
zk_p999_quorum_ack_latency      32
zk_avg_om_commit_process_time_ms        0.0
zk_min_om_commit_process_time_ms        0
zk_max_om_commit_process_time_ms        0
zk_cnt_om_commit_process_time_ms        0
zk_sum_om_commit_process_time_ms        0
zk_p50_om_commit_process_time_ms        0
zk_p95_om_commit_process_time_ms        0
zk_p99_om_commit_process_time_ms        0
zk_p999_om_commit_process_time_ms       0
zk_avg_read_final_proc_time_ms  0.271
zk_min_read_final_proc_time_ms  0
zk_max_read_final_proc_time_ms  167
zk_cnt_read_final_proc_time_ms  1249959
zk_sum_read_final_proc_time_ms  338749
zk_p50_read_final_proc_time_ms  0
zk_p95_read_final_proc_time_ms  1
zk_p99_read_final_proc_time_ms  1
zk_p999_read_final_proc_time_ms 1
zk_avg_commit_propagation_latency       0.0
zk_min_commit_propagation_latency       0
zk_max_commit_propagation_latency       0
zk_cnt_commit_propagation_latency       0
zk_sum_commit_propagation_latency       0
zk_p50_commit_propagation_latency       0
zk_p95_commit_propagation_latency       0
zk_p99_commit_propagation_latency       0
zk_p999_commit_propagation_latency      0
zk_avg_dead_watchers_cleaner_latency    0.0
zk_min_dead_watchers_cleaner_latency    0
zk_max_dead_watchers_cleaner_latency    0
zk_cnt_dead_watchers_cleaner_latency    0
zk_sum_dead_watchers_cleaner_latency    0
zk_p50_dead_watchers_cleaner_latency    0
zk_p95_dead_watchers_cleaner_latency    0
zk_p99_dead_watchers_cleaner_latency    0
zk_p999_dead_watchers_cleaner_latency   0
zk_avg_write_final_proc_time_ms 0.3783
zk_min_write_final_proc_time_ms 0
zk_max_write_final_proc_time_ms 3
zk_cnt_write_final_proc_time_ms 304
zk_sum_write_final_proc_time_ms 115
zk_p50_write_final_proc_time_ms 0
zk_p95_write_final_proc_time_ms 1
zk_p99_write_final_proc_time_ms 2
zk_p999_write_final_proc_time_ms        3
zk_avg_proposal_ack_creation_latency    3.1546
zk_min_proposal_ack_creation_latency    1
zk_max_proposal_ack_creation_latency    32
zk_cnt_proposal_ack_creation_latency    304
zk_sum_proposal_ack_creation_latency    959
zk_p50_proposal_ack_creation_latency    2
zk_p95_proposal_ack_creation_latency    11
zk_p99_proposal_ack_creation_latency    19
zk_p999_proposal_ack_creation_latency   32
zk_avg_proposal_latency 0.0
zk_min_proposal_latency 0
zk_max_proposal_latency 0
zk_cnt_proposal_latency 0
zk_sum_proposal_latency 0
zk_p50_proposal_latency 0
zk_p95_proposal_latency 0
zk_p99_proposal_latency 0
zk_p999_proposal_latency        0
zk_avg_om_proposal_process_time_ms      0.0
zk_min_om_proposal_process_time_ms      0
zk_max_om_proposal_process_time_ms      0
zk_cnt_om_proposal_process_time_ms      0
zk_sum_om_proposal_process_time_ms      0
zk_p50_om_proposal_process_time_ms      0
zk_p95_om_proposal_process_time_ms      0
zk_p99_om_proposal_process_time_ms      0
zk_p999_om_proposal_process_time_ms     0
zk_avg_sync_processor_queue_and_flush_time_ms   2.375
zk_min_sync_processor_queue_and_flush_time_ms   0
zk_max_sync_processor_queue_and_flush_time_ms   30
zk_cnt_sync_processor_queue_and_flush_time_ms   304
zk_sum_sync_processor_queue_and_flush_time_ms   722
zk_p50_sync_processor_queue_and_flush_time_ms   1
zk_p95_sync_processor_queue_and_flush_time_ms   9
zk_p99_sync_processor_queue_and_flush_time_ms   18
zk_p999_sync_processor_queue_and_flush_time_ms  30
zk_avg_propagation_latency      4.553
zk_min_propagation_latency      1
zk_max_propagation_latency      34
zk_cnt_propagation_latency      302
zk_sum_propagation_latency      1375
zk_p50_propagation_latency      3
zk_p95_propagation_latency      13
zk_p99_propagation_latency      21
zk_p999_propagation_latency     34
zk_avg_server_write_committed_time_ms   0.0
zk_min_server_write_committed_time_ms   0
zk_max_server_write_committed_time_ms   0
zk_cnt_server_write_committed_time_ms   0
zk_sum_server_write_committed_time_ms   0
zk_p50_server_write_committed_time_ms   0
zk_p95_server_write_committed_time_ms   0
zk_p99_server_write_committed_time_ms   0
zk_p999_server_write_committed_time_ms  0
zk_avg_sync_processor_queue_time_ms     0.2467
zk_min_sync_processor_queue_time_ms     0
zk_max_sync_processor_queue_time_ms     9
zk_cnt_sync_processor_queue_time_ms     304
zk_sum_sync_processor_queue_time_ms     75
zk_p50_sync_processor_queue_time_ms     0
zk_p95_sync_processor_queue_time_ms     1
zk_p99_sync_processor_queue_time_ms     5
zk_p999_sync_processor_queue_time_ms    9
zk_avg_sync_processor_queue_flush_time_ms       1.9362
zk_min_sync_processor_queue_flush_time_ms       0
zk_max_sync_processor_queue_flush_time_ms       29
zk_cnt_sync_processor_queue_flush_time_ms       298
zk_sum_sync_processor_queue_flush_time_ms       577
zk_p50_sync_processor_queue_flush_time_ms       1
zk_p95_sync_processor_queue_flush_time_ms       7
zk_p99_sync_processor_queue_flush_time_ms       15
zk_p999_sync_processor_queue_flush_time_ms      29
zk_avg_write_commitproc_time_ms 3.6151
zk_min_write_commitproc_time_ms 1
zk_max_write_commitproc_time_ms 30
zk_cnt_write_commitproc_time_ms 304
zk_sum_write_commitproc_time_ms 1099
zk_p50_write_commitproc_time_ms 2
zk_p95_write_commitproc_time_ms 12
zk_p99_write_commitproc_time_ms 18
zk_p999_write_commitproc_time_ms        30
zk_avg_2_learner_handler_qp_size        0.0011
zk_min_2_learner_handler_qp_size        0
zk_max_2_learner_handler_qp_size        4
zk_cnt_2_learner_handler_qp_size        967377
zk_sum_2_learner_handler_qp_size        1050
zk_avg_3_learner_handler_qp_size        0.001
zk_min_3_learner_handler_qp_size        0
zk_max_3_learner_handler_qp_size        1
zk_cnt_3_learner_handler_qp_size        959565
zk_sum_3_learner_handler_qp_size        957
zk_avg_trufflesolr_read_per_namespace   733.0827
zk_min_trufflesolr_read_per_namespace   80
zk_max_trufflesolr_read_per_namespace   36345620
zk_cnt_trufflesolr_read_per_namespace   1015670
zk_sum_trufflesolr_read_per_namespace   744570072
zk_avg_zookeeper_read_per_namespace     250.0
zk_min_zookeeper_read_per_namespace     250
zk_max_zookeeper_read_per_namespace     250
zk_cnt_zookeeper_read_per_namespace     2
zk_sum_zookeeper_read_per_namespace     500
zk_avg_trufflesolr_write_per_namespace  347.3285
zk_min_trufflesolr_write_per_namespace  34
zk_max_trufflesolr_write_per_namespace  1323
zk_cnt_trufflesolr_write_per_namespace  277
zk_sum_trufflesolr_write_per_namespace  96210
zk_avg_zookeeper_write_per_namespace    182.0
zk_min_zookeeper_write_per_namespace    182
zk_max_zookeeper_write_per_namespace    182
zk_cnt_zookeeper_write_per_namespace    1
zk_sum_zookeeper_write_per_namespace    182
zk_avg_2_learner_handler_qp_time_ms     0.0041
zk_min_2_learner_handler_qp_time_ms     0
zk_max_2_learner_handler_qp_time_ms     3
zk_cnt_2_learner_handler_qp_time_ms     967
zk_sum_2_learner_handler_qp_time_ms     4
zk_p50_2_learner_handler_qp_time_ms     0
zk_p95_2_learner_handler_qp_time_ms     0
zk_p99_2_learner_handler_qp_time_ms     0
zk_p999_2_learner_handler_qp_time_ms    3
zk_avg_3_learner_handler_qp_time_ms     0.0
zk_min_3_learner_handler_qp_time_ms     0
zk_max_3_learner_handler_qp_time_ms     0
zk_cnt_3_learner_handler_qp_time_ms     959
zk_sum_3_learner_handler_qp_time_ms     0
zk_p50_3_learner_handler_qp_time_ms     0
zk_p95_3_learner_handler_qp_time_ms     0
zk_p99_3_learner_handler_qp_time_ms     0
zk_p999_3_learner_handler_qp_time_ms    0

{code}
follower
{code:java}
zk_version      3.6.1--104dcb3e3fb464b30c5186d229e00af9f332524b, built on 
04/21/2020 15:01 GMT
zk_server_state follower
zk_peer_state   following - broadcast
zk_ephemerals_count     35
zk_min_latency  0
zk_avg_latency  0.5746
zk_num_alive_connections        3
zk_max_file_descriptor_count    65000
zk_outstanding_requests 0
zk_approximate_data_size        488437179
zk_znode_count  790
zk_open_file_descriptor_count   68
zk_global_sessions      9
zk_local_sessions       0
zk_uptime       404349965
zk_last_client_response_size    16
zk_max_latency  1624
zk_packets_sent 77715
zk_outstanding_tls_handshake    0
zk_packets_received     77718
zk_max_client_response_size     1632
zk_connection_drop_probability  0.0
zk_watch_count  47
zk_min_client_response_size     16
zk_quorum_size  3
zk_proposal_count       0
zk_outstanding_changes_removed  0
zk_stale_requests_dropped       0
zk_large_requests_rejected      0
zk_connection_rejected  0
zk_sessionless_connections_expired      2
zk_looking_count        2
zk_dead_watchers_queued 0
zk_stale_requests       0
zk_connection_drop_count        0
zk_learner_proposal_received_count      304
zk_digest_mismatches_count      0
zk_dead_watchers_cleared        0
zk_response_packet_cache_hits   18058
zk_bytes_received_count 3179440
zk_add_dead_watcher_stall_time  0
zk_request_throttle_wait_count  0
zk_response_packet_cache_misses 39
zk_ensemble_auth_success        0
zk_prep_processor_request_queued        0
zk_learner_commit_received_count        304
zk_stale_replies        0
zk_connection_request_count     14
zk_ensemble_auth_fail   0
zk_diff_count   0
zk_response_packet_get_children_cache_misses    0
zk_connection_revalidate_count  6
zk_quit_leading_due_to_disloyal_voter   0
zk_snap_count   0
zk_unrecoverable_error_count    0
zk_commit_count 0
zk_stale_sessions_expired       0
zk_response_packet_get_children_cache_hits      0
zk_sync_processor_request_queued        305
zk_outstanding_changes_queued   0
zk_request_commit_queued        7621
zk_ensemble_auth_skip   0
zk_tls_handshake_exceeded       0
zk_revalidate_count     0
zk_avg_node_created_watch_count 0.0
zk_min_node_created_watch_count 0
zk_max_node_created_watch_count 0
zk_cnt_node_created_watch_count 0
zk_sum_node_created_watch_count 0
zk_avg_session_queues_drained   0.9618
zk_min_session_queues_drained   0
zk_max_session_queues_drained   1
zk_cnt_session_queues_drained   7621
zk_sum_session_queues_drained   7330
zk_avg_write_commit_proc_req_queued     0.1217
zk_min_write_commit_proc_req_queued     0
zk_max_write_commit_proc_req_queued     3
zk_cnt_write_commit_proc_req_queued     181792
zk_sum_write_commit_proc_req_queued     22117
zk_avg_connection_token_deficit 0.0
zk_min_connection_token_deficit 0
zk_max_connection_token_deficit 0
zk_cnt_connection_token_deficit 14
zk_sum_connection_token_deficit 0
zk_avg_read_commit_proc_req_queued      0.9711
zk_min_read_commit_proc_req_queued      0
zk_max_read_commit_proc_req_queued      5
zk_cnt_read_commit_proc_req_queued      181792
zk_sum_read_commit_proc_req_queued      176544
zk_avg_node_deleted_watch_count 0.0
zk_min_node_deleted_watch_count 0
zk_max_node_deleted_watch_count 0
zk_cnt_node_deleted_watch_count 0
zk_sum_node_deleted_watch_count 0
zk_avg_startup_txns_load_time   15.0
zk_min_startup_txns_load_time   15
zk_max_startup_txns_load_time   15
zk_cnt_startup_txns_load_time   1
zk_sum_startup_txns_load_time   15
zk_avg_sync_processor_queue_size        0.0456
zk_min_sync_processor_queue_size        0
zk_max_sync_processor_queue_size        2
zk_cnt_sync_processor_queue_size        307
zk_sum_sync_processor_queue_size        14
zk_avg_follower_sync_time       56.0
zk_min_follower_sync_time       56
zk_max_follower_sync_time       56
zk_cnt_follower_sync_time       2
zk_sum_follower_sync_time       112
zk_avg_prep_processor_queue_size        0.0
zk_min_prep_processor_queue_size        0
zk_max_prep_processor_queue_size        0
zk_cnt_prep_processor_queue_size        0
zk_sum_prep_processor_queue_size        0
zk_avg_fsynctime        1.5918
zk_min_fsynctime        0
zk_max_fsynctime        106
zk_cnt_fsynctime        294
zk_sum_fsynctime        468
zk_avg_reads_issued_from_session_queue  0.9616
zk_min_reads_issued_from_session_queue  0
zk_max_reads_issued_from_session_queue  2
zk_cnt_reads_issued_from_session_queue  7621
zk_sum_reads_issued_from_session_queue  7328
zk_avg_snapshottime     0.0
zk_min_snapshottime     0
zk_max_snapshottime     0
zk_cnt_snapshottime     0
zk_sum_snapshottime     0
zk_avg_startup_txns_loaded      16.0
zk_min_startup_txns_loaded      16
zk_max_startup_txns_loaded      16
zk_cnt_startup_txns_loaded      1
zk_sum_startup_txns_loaded      16
zk_avg_reads_after_write_in_session_queue       0.9997
zk_min_reads_after_write_in_session_queue       0
zk_max_reads_after_write_in_session_queue       2
zk_cnt_reads_after_write_in_session_queue       7330
zk_sum_reads_after_write_in_session_queue       7328
zk_avg_requests_in_session_queue        1.7319
zk_min_requests_in_session_queue        1
zk_max_requests_in_session_queue        6
zk_cnt_requests_in_session_queue        21988
zk_sum_requests_in_session_queue        38082
zk_avg_write_commit_proc_issued 1.0
zk_min_write_commit_proc_issued 1
zk_max_write_commit_proc_issued 1
zk_cnt_write_commit_proc_issued 7621
zk_sum_write_commit_proc_issued 7621
zk_avg_prep_process_time        0.0
zk_min_prep_process_time        0
zk_max_prep_process_time        0
zk_cnt_prep_process_time        0
zk_sum_prep_process_time        0
zk_avg_pending_session_queue_size       1.0
zk_min_pending_session_queue_size       1
zk_max_pending_session_queue_size       1
zk_cnt_pending_session_queue_size       7330
zk_sum_pending_session_queue_size       7330
zk_avg_time_waiting_empty_pool_in_commit_processor_read_ms      0.0115
zk_min_time_waiting_empty_pool_in_commit_processor_read_ms      0
zk_max_time_waiting_empty_pool_in_commit_processor_read_ms      1
zk_cnt_time_waiting_empty_pool_in_commit_processor_read_ms      7621
zk_sum_time_waiting_empty_pool_in_commit_processor_read_ms      88
zk_avg_commit_process_time      0.0197
zk_min_commit_process_time      0
zk_max_commit_process_time      11
zk_cnt_commit_process_time      181792
zk_sum_commit_process_time      3586
zk_avg_dbinittime       5338.0
zk_min_dbinittime       5338
zk_max_dbinittime       5338
zk_cnt_dbinittime       1
zk_sum_dbinittime       5338
zk_avg_netty_queued_buffer_capacity     0.0
zk_min_netty_queued_buffer_capacity     0
zk_max_netty_queued_buffer_capacity     0
zk_cnt_netty_queued_buffer_capacity     0
zk_sum_netty_queued_buffer_capacity     0
zk_avg_election_time    151.0
zk_min_election_time    20
zk_max_election_time    282
zk_cnt_election_time    2
zk_sum_election_time    302
zk_avg_commit_commit_proc_req_queued    0.0422
zk_min_commit_commit_proc_req_queued    0
zk_max_commit_commit_proc_req_queued    3
zk_cnt_commit_commit_proc_req_queued    181792
zk_sum_commit_commit_proc_req_queued    7674
zk_avg_sync_processor_batch_size        1.0374
zk_min_sync_processor_batch_size        1
zk_max_sync_processor_batch_size        3
zk_cnt_sync_processor_batch_size        294
zk_sum_sync_processor_batch_size        305
zk_avg_node_children_watch_count        3.75
zk_min_node_children_watch_count        3
zk_max_node_children_watch_count        4
zk_cnt_node_children_watch_count        4
zk_sum_node_children_watch_count        15
zk_avg_write_batch_time_in_commit_processor     0.1476
zk_min_write_batch_time_in_commit_processor     0
zk_max_write_batch_time_in_commit_processor     11
zk_cnt_write_batch_time_in_commit_processor     7621
zk_sum_write_batch_time_in_commit_processor     1125
zk_avg_read_commit_proc_issued  0.8871
zk_min_read_commit_proc_issued  0
zk_max_read_commit_proc_issued  5
zk_cnt_read_commit_proc_issued  181792
zk_sum_read_commit_proc_issued  161263
zk_avg_concurrent_request_processing_in_commit_processor        1.0207
zk_min_concurrent_request_processing_in_commit_processor        1
zk_max_concurrent_request_processing_in_commit_processor        2
zk_cnt_concurrent_request_processing_in_commit_processor        242
zk_sum_concurrent_request_processing_in_commit_processor        247
zk_avg_node_changed_watch_count 0.0
zk_min_node_changed_watch_count 0
zk_max_node_changed_watch_count 0
zk_cnt_node_changed_watch_count 0
zk_sum_node_changed_watch_count 0
zk_avg_sync_process_time        0.0918
zk_min_sync_process_time        0
zk_max_sync_process_time        1
zk_cnt_sync_process_time        305
zk_sum_sync_process_time        28
zk_avg_startup_snap_load_time   5268.0
zk_min_startup_snap_load_time   5268
zk_max_startup_snap_load_time   5268
zk_cnt_startup_snap_load_time   1
zk_sum_startup_snap_load_time   5268
zk_avg_prep_processor_queue_time_ms     0.0
zk_min_prep_processor_queue_time_ms     0
zk_max_prep_processor_queue_time_ms     0
zk_cnt_prep_processor_queue_time_ms     0
zk_sum_prep_processor_queue_time_ms     0
zk_p50_prep_processor_queue_time_ms     0
zk_p95_prep_processor_queue_time_ms     0
zk_p99_prep_processor_queue_time_ms     0
zk_p999_prep_processor_queue_time_ms    0
zk_avg_close_session_prep_time  0.0
zk_min_close_session_prep_time  0
zk_max_close_session_prep_time  0
zk_cnt_close_session_prep_time  0
zk_sum_close_session_prep_time  0
zk_p50_close_session_prep_time  0
zk_p95_close_session_prep_time  0
zk_p99_close_session_prep_time  0
zk_p999_close_session_prep_time 0
zk_avg_read_commitproc_time_ms  0.8202
zk_min_read_commitproc_time_ms  0
zk_max_read_commitproc_time_ms  13334
zk_cnt_read_commitproc_time_ms  168591
zk_sum_read_commitproc_time_ms  138271
zk_p50_read_commitproc_time_ms  0
zk_p95_read_commitproc_time_ms  1
zk_p99_read_commitproc_time_ms  1
zk_p999_read_commitproc_time_ms 2
zk_avg_updatelatency    6.0714
zk_min_updatelatency    3
zk_max_updatelatency    13
zk_cnt_updatelatency    14
zk_sum_updatelatency    85
zk_p50_updatelatency    5
zk_p95_updatelatency    13
zk_p99_updatelatency    13
zk_p999_updatelatency   13
zk_avg_local_write_committed_time_ms    0.0482
zk_min_local_write_committed_time_ms    0
zk_max_local_write_committed_time_ms    5
zk_cnt_local_write_committed_time_ms    7330
zk_sum_local_write_committed_time_ms    353
zk_p50_local_write_committed_time_ms    0
zk_p95_local_write_committed_time_ms    0
zk_p99_local_write_committed_time_ms    1
zk_p999_local_write_committed_time_ms   1
zk_avg_readlatency      1.2633
zk_min_readlatency      0
zk_max_readlatency      13334
zk_cnt_readlatency      175907
zk_sum_readlatency      222226
zk_p50_readlatency      0
zk_p95_readlatency      1
zk_p99_readlatency      1
zk_p999_readlatency     15
zk_avg_quorum_ack_latency       0.0
zk_min_quorum_ack_latency       0
zk_max_quorum_ack_latency       0
zk_cnt_quorum_ack_latency       0
zk_sum_quorum_ack_latency       0
zk_p50_quorum_ack_latency       0
zk_p95_quorum_ack_latency       0
zk_p99_quorum_ack_latency       0
zk_p999_quorum_ack_latency      0
zk_avg_om_commit_process_time_ms        0.0
zk_min_om_commit_process_time_ms        0
zk_max_om_commit_process_time_ms        0
zk_cnt_om_commit_process_time_ms        0
zk_sum_om_commit_process_time_ms        0
zk_p50_om_commit_process_time_ms        0
zk_p95_om_commit_process_time_ms        0
zk_p99_om_commit_process_time_ms        0
zk_p999_om_commit_process_time_ms       0
zk_avg_read_final_proc_time_ms  0.1748
zk_min_read_final_proc_time_ms  0
zk_max_read_final_proc_time_ms  59
zk_cnt_read_final_proc_time_ms  168591
zk_sum_read_final_proc_time_ms  29471
zk_p50_read_final_proc_time_ms  0
zk_p95_read_final_proc_time_ms  1
zk_p99_read_final_proc_time_ms  1
zk_p999_read_final_proc_time_ms 1
zk_avg_commit_propagation_latency       342.8393
zk_min_commit_propagation_latency       1
zk_max_commit_propagation_latency       103233
zk_cnt_commit_propagation_latency       305
zk_sum_commit_propagation_latency       104566
zk_p50_commit_propagation_latency       3
zk_p95_commit_propagation_latency       14
zk_p99_commit_propagation_latency       21
zk_p999_commit_propagation_latency      103233
zk_avg_dead_watchers_cleaner_latency    0.0
zk_min_dead_watchers_cleaner_latency    0
zk_max_dead_watchers_cleaner_latency    0
zk_cnt_dead_watchers_cleaner_latency    0
zk_sum_dead_watchers_cleaner_latency    0
zk_p50_dead_watchers_cleaner_latency    0
zk_p95_dead_watchers_cleaner_latency    0
zk_p99_dead_watchers_cleaner_latency    0
zk_p999_dead_watchers_cleaner_latency   0
zk_avg_write_final_proc_time_ms 0.1401
zk_min_write_final_proc_time_ms 0
zk_max_write_final_proc_time_ms 11
zk_cnt_write_final_proc_time_ms 7621
zk_sum_write_final_proc_time_ms 1068
zk_p50_write_final_proc_time_ms 0
zk_p95_write_final_proc_time_ms 1
zk_p99_write_final_proc_time_ms 1
zk_p999_write_final_proc_time_ms        1
zk_avg_proposal_ack_creation_latency    342.5574
zk_min_proposal_ack_creation_latency    1
zk_max_proposal_ack_creation_latency    103236
zk_cnt_proposal_ack_creation_latency    305
zk_sum_proposal_ack_creation_latency    104480
zk_p50_proposal_ack_creation_latency    2
zk_p95_proposal_ack_creation_latency    12
zk_p99_proposal_ack_creation_latency    91
zk_p999_proposal_ack_creation_latency   103236
zk_avg_proposal_latency 1.3849
zk_min_proposal_latency 0
zk_max_proposal_latency 18
zk_cnt_proposal_latency 304
zk_sum_proposal_latency 421
zk_p50_proposal_latency 1
zk_p95_proposal_latency 3
zk_p99_proposal_latency 10
zk_p999_proposal_latency        18
zk_avg_om_proposal_process_time_ms      0.0
zk_min_om_proposal_process_time_ms      0
zk_max_om_proposal_process_time_ms      0
zk_cnt_om_proposal_process_time_ms      0
zk_sum_om_proposal_process_time_ms      0
zk_p50_om_proposal_process_time_ms      0
zk_p95_om_proposal_process_time_ms      0
zk_p99_om_proposal_process_time_ms      0
zk_p999_om_proposal_process_time_ms     0
zk_avg_sync_processor_queue_and_flush_time_ms   2.6852
zk_min_sync_processor_queue_and_flush_time_ms   0
zk_max_sync_processor_queue_and_flush_time_ms   106
zk_cnt_sync_processor_queue_and_flush_time_ms   305
zk_sum_sync_processor_queue_and_flush_time_ms   819
zk_p50_sync_processor_queue_and_flush_time_ms   1
zk_p95_sync_processor_queue_and_flush_time_ms   9
zk_p99_sync_processor_queue_and_flush_time_ms   28
zk_p999_sync_processor_queue_and_flush_time_ms  106
zk_avg_propagation_latency      344.8125
zk_min_propagation_latency      1
zk_max_propagation_latency      103235
zk_cnt_propagation_latency      304
zk_sum_propagation_latency      104823
zk_p50_propagation_latency      4
zk_p95_propagation_latency      15
zk_p99_propagation_latency      22
zk_p999_propagation_latency     103235
zk_avg_server_write_committed_time_ms   0.3058
zk_min_server_write_committed_time_ms   0
zk_max_server_write_committed_time_ms   10
zk_cnt_server_write_committed_time_ms   291
zk_sum_server_write_committed_time_ms   89
zk_p50_server_write_committed_time_ms   0
zk_p95_server_write_committed_time_ms   1
zk_p99_server_write_committed_time_ms   8
zk_p999_server_write_committed_time_ms  10
zk_avg_sync_processor_queue_time_ms     0.3443
zk_min_sync_processor_queue_time_ms     0
zk_max_sync_processor_queue_time_ms     11
zk_cnt_sync_processor_queue_time_ms     305
zk_sum_sync_processor_queue_time_ms     105
zk_p50_sync_processor_queue_time_ms     0
zk_p95_sync_processor_queue_time_ms     2
zk_p99_sync_processor_queue_time_ms     7
zk_p999_sync_processor_queue_time_ms    11
zk_avg_sync_processor_queue_flush_time_ms       2.2245
zk_min_sync_processor_queue_flush_time_ms       0
zk_max_sync_processor_queue_flush_time_ms       106
zk_cnt_sync_processor_queue_flush_time_ms       294
zk_sum_sync_processor_queue_flush_time_ms       654
zk_p50_sync_processor_queue_flush_time_ms       1
zk_p95_sync_processor_queue_flush_time_ms       4
zk_p99_sync_processor_queue_flush_time_ms       31
zk_p999_sync_processor_queue_flush_time_ms      106
zk_avg_write_commitproc_time_ms 0.5658
zk_min_write_commitproc_time_ms 0
zk_max_write_commitproc_time_ms 20
zk_cnt_write_commitproc_time_ms 7330
zk_sum_write_commitproc_time_ms 4147
zk_p50_write_commitproc_time_ms 1
zk_p95_write_commitproc_time_ms 1
zk_p99_write_commitproc_time_ms 2
zk_p999_write_commitproc_time_ms        4
zk_avg_trufflesolr_read_per_namespace   303.6124
zk_min_trufflesolr_read_per_namespace   80
zk_max_trufflesolr_read_per_namespace   3361
zk_cnt_trufflesolr_read_per_namespace   22339
zk_sum_trufflesolr_read_per_namespace   6782397
zk_avg_trufflesolr_write_per_namespace  347.3285
zk_min_trufflesolr_write_per_namespace  34
zk_max_trufflesolr_write_per_namespace  1323
zk_cnt_trufflesolr_write_per_namespace  277
zk_sum_trufflesolr_write_per_namespace  96210
zk_avg_zookeeper_write_per_namespace    182.0
zk_min_zookeeper_write_per_namespace    182
zk_max_zookeeper_write_per_namespace    182
zk_cnt_zookeeper_write_per_namespace    3
zk_sum_zookeeper_write_per_namespace    546

{code}
 

> Solr 8.6 / ZK 3.6.1 / Admin UI - ZK Status Null
> -----------------------------------------------
>
>                 Key: SOLR-14669
>                 URL: https://issues.apache.org/jira/browse/SOLR-14669
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: Admin UI, SolrCloud
>    Affects Versions: 8.6
>            Reporter: Jörn Franke
>            Priority: Minor
>
> When opening the Admin UI / ZK Status page it shows just null. Solr 8.6.0 / 
> ZK 3.6.1. Zk is a 3 node ensemble.
> It seems to be cosmetic in the UI - otherwise Solr seems to work fine. 
> Deleted already browser cache and restarted browser. Issue persists.
> In the logfiles I find the following error:
>  2020-07-20 16:34:27.853 ERROR (qtp767511741-2227) [   ] 
> o.a.s.h.RequestHandlerBase java.lang.NumberFormatException: For input string: 
> "null"
>      at 
> java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
>      at java.base/java.lang.Integer.parseInt(Integer.java:652)
>      at java.base/java.lang.Integer.parseInt(Integer.java:770)
>      at 
> org.apache.solr.handler.admin.ZookeeperStatusHandler.getZkStatus(ZookeeperStatusHandler.java:116)
>      at 
> org.apache.solr.handler.admin.ZookeeperStatusHandler.handleRequestBody(ZookeeperStatusHandler.java:78)
>      at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:211)
>      at 
> org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:839)
>      at 
> org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:805)
>      at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:558)
>      at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:419)
>      at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:351)
>      at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
>      at 
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
>      at 
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
>      at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
>      at 
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1711)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
>      at 
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1347)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
>      at 
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
>      at 
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1678)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
>      at 
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1249)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
>      at 
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
>      at 
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:152)
>      at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>      at 
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
>      at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>      at org.eclipse.jetty.server.Server.handle(Server.java:505)
>      at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
>      at 
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
>      at 
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
>      at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
>      at 
> org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:427)
>      at 
> org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:321)
>      at 
> org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:159)
>      at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
>      at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
>      at 
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
>      at 
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:781)
>      at 
> org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:917)
>      at java.base/java.lang.Thread.run(Thread.java:834)
>  2020-07-20 16:34:27.853 INFO  (qtp767511741-2227) [   ] o.a.s.s.HttpSolrCall 
> [admin] webapp=null path=/admin/zookeeper/status 
> params=\{wt=json&_=1595262857191} status=500 QTime=28
>  2020-07-20 16:34:27.853 ERROR (qtp767511741-2227) [   ] o.a.s.s.HttpSolrCall 
> null:java.lang.NumberFormatException: For input string: "null"
>      at 
> java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
>      at java.base/java.lang.Integer.parseInt(Integer.java:652)
>      at java.base/java.lang.Integer.parseInt(Integer.java:770)
>      at 
> org.apache.solr.handler.admin.ZookeeperStatusHandler.getZkStatus(ZookeeperStatusHandler.java:116)
>      at 
> org.apache.solr.handler.admin.ZookeeperStatusHandler.handleRequestBody(ZookeeperStatusHandler.java:78)
>      at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:211)
>      at 
> org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:839)
>      at 
> org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:805)
>      at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:558)
>      at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:419)
>      at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:351)
>      at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
>      at 
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
>      at 
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
>      at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
>      at 
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1711)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
>      at 
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1347)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
>      at 
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
>      at 
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1678)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
>      at 
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1249)
>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
>      at 
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
>      at 
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:152)
>      at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>      at 
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
>      at 
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
>      at org.eclipse.jetty.server.Server.handle(Server.java:505)
>      at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
>      at 
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
>      at 
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
>      at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
>      at 
> org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:427)
>      at 
> org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:321)
>      at 
> org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:159)
>      at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
>      at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
>      at 
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
>      at 
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
>      at 
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:781)
>      at 
> org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:917)
>      at java.base/java.lang.Thread.run(Thread.java:834)



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