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https://issues.apache.org/jira/browse/SOLR-13240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17039154#comment-17039154
]
Christine Poerschke commented on SOLR-13240:
--------------------------------------------
bq. ... very easy to trigger in the production environment, it makes
UTILIZENODE action not usable in Solr 7.x.x versions. Do you think this feature
should be removed or marked as beta in Solr 7.x ...
Understood. Unfortunately I'm not aware of any mechanisms to remove a feature
from an existing release or to mark it as beta. On this ticket here extending
the "Affected versions" tagging beyond the current 7.6 should be easily
possible though, let me go and do that.
> UTILIZENODE action results in an exception
> ------------------------------------------
>
> Key: SOLR-13240
> URL: https://issues.apache.org/jira/browse/SOLR-13240
> Project: Solr
> Issue Type: Bug
> Components: AutoScaling
> Affects Versions: 7.6
> Reporter: Hendrik Haddorp
> Assignee: Christine Poerschke
> Priority: Major
> Fix For: master (9.0), 8.3
>
> Attachments: SOLR-13240.patch, SOLR-13240.patch, SOLR-13240.patch,
> SOLR-13240.patch, SOLR-13240.patch, SOLR-13240.patch, SOLR-13240.patch,
> SOLR-13240.patch, solr-solrj-7.5.0.jar
>
>
> When I invoke the UTILIZENODE action the REST call fails like this after it
> moved a few replicas:
> {
> "responseHeader":{
> "status":500,
> "QTime":40220},
> "Operation utilizenode caused
> exception:":"java.lang.IllegalArgumentException:java.lang.IllegalArgumentException:
> Comparison method violates its general contract!",
> "exception":{
> "msg":"Comparison method violates its general contract!",
> "rspCode":-1},
> "error":{
> "metadata":[
> "error-class","org.apache.solr.common.SolrException",
> "root-error-class","org.apache.solr.common.SolrException"],
> "msg":"Comparison method violates its general contract!",
> "trace":"org.apache.solr.common.SolrException: Comparison method violates
> its general contract!\n\tat
> org.apache.solr.client.solrj.SolrResponse.getException(SolrResponse.java:53)\n\tat
>
> org.apache.solr.handler.admin.CollectionsHandler.invokeAction(CollectionsHandler.java:274)\n\tat
>
> org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:246)\n\tat
>
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)\n\tat
>
> org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:734)\n\tat
> org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:715)\n\tat
> org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:496)\n\tat
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:377)\n\tat
>
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:323)\n\tat
>
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1634)\n\tat
>
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)\n\tat
>
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)\n\tat
>
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)\n\tat
>
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat
>
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)\n\tat
>
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)\n\tat
>
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)\n\tat
>
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1317)\n\tat
>
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)\n\tat
>
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)\n\tat
>
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)\n\tat
>
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)\n\tat
>
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1219)\n\tat
>
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)\n\tat
>
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)\n\tat
>
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)\n\tat
>
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat
>
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)\n\tat
>
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat
> org.eclipse.jetty.server.Server.handle(Server.java:531)\n\tat
> org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:352)\n\tat
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)\n\tat
>
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281)\n\tat
> org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)\n\tat
> org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)\n\tat
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)\n\tat
>
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)\n\tat
>
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)\n\tat
>
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)\n\tat
>
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)\n\tat
>
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:762)\n\tat
>
> org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:680)\n\tat
> java.lang.Thread.run(Thread.java:748)\n",
> "code":500}}
> The logs show this additional exception:
> 2019-02-10 00:09:00.539 ERROR
> (OverseerThreadFactory-1268-thread-38-processing-n:agent2:9151_solr) [ ]
> o.a.s.c.a.c.OverseerCollectionMessageHandler Operation utilizenode
> failed:java.lang.IllegalArgumentException: Comparison method violates its
> general contract!
> at java.util.TimSort.mergeLo(TimSort.java:777)
> at java.util.TimSort.mergeAt(TimSort.java:514)
> at java.util.TimSort.mergeCollapse(TimSort.java:439)
> at java.util.TimSort.sort(TimSort.java:245)
> at java.util.Arrays.sort(Arrays.java:1512)
> at java.util.ArrayList.sort(ArrayList.java:1462)
> at
> org.apache.solr.client.solrj.cloud.autoscaling.MoveReplicaSuggester.tryEachNode(MoveReplicaSuggester.java:50)
> at
> org.apache.solr.client.solrj.cloud.autoscaling.MoveReplicaSuggester.init(MoveReplicaSuggester.java:38)
> at
> org.apache.solr.client.solrj.cloud.autoscaling.Suggester.getSuggestion(Suggester.java:187)
> at
> org.apache.solr.cloud.api.collections.UtilizeNodeCmd.call(UtilizeNodeCmd.java:100)
> at
> org.apache.solr.cloud.api.collections.OverseerCollectionMessageHandler.processMessage(OverseerCollectionMessageHandler.java:259)
> at
> org.apache.solr.cloud.OverseerTaskProcessor$Runner.run(OverseerTaskProcessor.java:478)
> at
> org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:209)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> I suspect this to be caused by this comparator:
> https://github.com/apache/lucene-solr/blob/master/solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/MoveReplicaSuggester.java#L98
> In case it is possible that both compared replicas are leaders the result
> would not be correct.
> see also the mail thread about this:
> https://www.mail-archive.com/search?l=solr-u...@lucene.apache.org&q=subject:%22Re%5C%3A+CloudSolrClient+getDocCollection%22&o=newest&f=1
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