Okay, after digging a little bit through the code, I think the problem is in this line: https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/cloud/OverseerCollectionMessageHandler.java?utf8=%E2%9C%93#L153 <https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/cloud/OverseerCollectionMessageHandler.java?utf8=%E2%9C%93#L153>
Is there any reason why this a SynchronousQueue? If I understand this correctly this means that there cannot be more than 10 parallel Commands, which means that Collection Operations can only be executed for less than 10 collections? Would love to contribute a patch for this if someone says how that should look like :) Thanks Björn > On 3. Aug 2017, at 18:51, Björn Häuser <bjoernhaeu...@gmail.com> wrote: > > Hey Folks, > > we today hit the same error three times, a REPLACENODE call was not > successful. > > Here is our scenario: > > 3 Node Solrcloud cluster running in Kubernetes on top of AWS. > > Today we wanted to rotate the underlying storage (increased from 50gb to > 300gb). > > After we rotated one node we tried to replace with this call: > > • curl > 'solr-2.solr-discovery.default.svc.cluster.local:8983/solr/admin/collections?action=REPLACENODE&source=solr-2.solr-discovery.default.svc.cluster.local.:8983_solr&target=solr-2.solr-discovery.default.svc.cluster.local.:8983_solr&async=4495d85b-0aa4-45ab-8067-9d7d4da375d3' > • curl > 'solr-2.solr-discovery.default.svc.cluster.local:8983/solr/admin/collections?action=REQUESTSTATUS&requestid=4495d85b-0aa4-45ab-8067-9d7d4da375d3’ > > The error we got was: > > <?xml version="1.0" encoding="UTF-8"?> > <response> > <lst name="responseHeader"><int name="status">0</int><int > name="QTime">28</int></lst><str name="Operation replacenode caused > exception:">java.util.concurrent.RejectedExecutionException:java.util.concurrent.RejectedExecutionException: > Task > org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor$$Lambda$15/509076276@5c9136c8 > rejected from > org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor@1cce4506[Running, > pool size = 10, active threads = 10, queued tasks = 0, completed tasks = > 0]</str><lst name="exception"><str name="msg">Task > org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor$$Lambda$15/509076276@5c9136c8 > rejected from > org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor@1cce4506[Running, > pool size = 10, active threads = 10, queued tasks = 0, completed tasks = > 0]</str><int name="rspCode">-1</int></lst><lst name="status"><str > name="state">failed</str><str name="msg">found > [4495d85b-0aa4-45ab-8067-9d7d4da375d3] in failed tasks</str></lst> > </response> > > > The problem was that afterwards we had the same shard on the same node twice. > One recovered and we had to delete the other one manually. For some > collections the REPLACENODE went through and everything was fine again. > > Can you advice what we did wrong here or which configuration we need to adapt? > > Thanks > Björn
