Yonik Seeley created SOLR-14058:
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Summary: AIOOBE in PeerSync
Key: SOLR-14058
URL: https://issues.apache.org/jira/browse/SOLR-14058
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: 8.3
Reporter: Yonik Seeley
We hit an exception with 8.3 that someone else also hit on stackoverflow:
https://stackoverflow.com/questions/58891563/problem-in-syncing-replicas-with-solr-8-3-with-zookeeper-3-5-6
{quote}
I recently converted a solr 7.x + zookeeper 3.4.14 to solr 8.3 + zk 3.5.6, and
depending on how I start the solr nodes I'm geting a sync exception.
My setup uses 3 zk nodes and 2 solr nodes (let's call it A and B). The
collection that has this problem has 1 shard and 2 replicas. I've noticed 2
situations: (1) which works fine and (2) which does not work.
1) This works: I start solr node A, and wait until it's replica is elected
leader ("green" in the Solr interface 'Cloud'->'Graph') - which takes about 2
min; and only then start solr node B. Both replicas are active and the one in A
is the leader.
2) This does NOT work: I start solr node A, and a few secs after I star solr
node B (that is, before the 'A' replica is elected leader - still "Down" in the
solr interface). In this case I get the following exception:
ERROR (coreZkRegister-1-thread-2-processing-n:192.168.15.20:8986_solr
x:alldata_shard1_replica_n1 c:alldata s:shard1 r:core_node3) [c:alldata
s:shard1 r:core_node3 x:alldata_shard1_replica_n1] o.a.s.c.SyncStrategy Sync
Failed:java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 99
It seems that if both solr node are started soon after each other, then ZK
cannot elect one as leader. This error only appears in the solr.log of node A,
even if I invert the order of starting nodes.
{quote}
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