Ran /solr/58f449cec94a2c75-core-248/admin/luke at 7:05pm PST It showed "lastModified: 2018-02-10T02:25:08.231Z" indicating commit blocked for about 41 mins. Hard commit is set as 10secs in solrconfig.xml
Other cores are also now blocked. https://jstack.review analysis of the thread dump says "Potential Deadlock" for three 3 cores. 0x000000027afca8e0 ConcurrentMergeScheduler Possible deadlock Held by commitScheduler-26-thread-1 awaiting notification , holding [ 0x000000027afca8e0 ] 0x000000027fd19080 ConcurrentMergeScheduler Possible deadlock Held by commitScheduler-19-thread-1 awaiting notification , holding [ 0x000000027fd19080 0x00000002615ada20 ] 0x0000000280da09c8 ConcurrentMergeScheduler Possible deadlock Held by commitScheduler-24-thread-1 awaiting notification , holding [ 0x0000000280da09c8 0x000000028e0cbf10 ] Thread dump and top output are from that condition are available at https://github.com/mohsinbeg/datadump/tree/master/solr58f449cec94a2c75_core_248/solr58f449cec94a2c75_core_248 848 thread(s) have this kind of stack: ------- at java.lang.Object.wait(Native Method) at org.apache.lucene.index.ConcurrentMergeScheduler.doStall(ConcurrentMergeScheduler.java:616) at org.apache.lucene.index.ConcurrentMergeScheduler.maybeStall(ConcurrentMergeScheduler.java:602) ... at org.apache.solr.update.DirectUpdateHandler2.allowDuplicateUpdate(DirectUpdateHandler2.java:276) ... -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
