[jira] [Commented] (SOLR-12487) Possible corruption in tlog after restart of Solr

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[jira] [Commented] (SOLR-12487) Possible corruption in tlog after restart of Solr

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/SOLR-12487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16512279#comment-16512279 ]

Varun Thacker commented on SOLR-12487:
--------------------------------------

Hi Lars,

Have you always been on Solr 6.5.1 or did you upgrade recently ?

 

 

> Possible corruption in tlog after restart of Solr
> -------------------------------------------------
>
>                 Key: SOLR-12487
>                 URL: https://issues.apache.org/jira/browse/SOLR-12487
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public)
>          Components: SolrCloud, update
>    Affects Versions: 6.5.1
>         Environment: Windows server 2012
> 12 CPU
> 96GB RAM
> -DzkClientTimeout=45000-DzkRun
> --Xms16g-Xmx16g-Xss256k
>            Reporter: Lars Gjestang
>            Priority: Major
>
> After restarting Solr we encountered issues replaying tlogs from one of our six shards. The other shards were up and running after a couple hours of replay (due to total tlog of 20gb which we are going to change from "on request" to maxDocs/maxTime). 
> The log first states warnings about "Unexpected log entry or corrupt log" and then we get the following error message:
>  
> java.util.concurrent.ExecutionException: org.apache.solr.common.SolrException: Unable to create core [VCloud_shard1_replica1]
>  at java.util.concurrent.FutureTask.report(Unknown Source)
>  at java.util.concurrent.FutureTask.get(Unknown Source)
>  at org.apache.solr.core.CoreContainer.lambda$load$6(CoreContainer.java:581)
>  at com.codahale.metrics.InstrumentedExecutorService$InstrumentedRunnable.run(InstrumentedExecutorService.java:176)
>  at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
>  at java.util.concurrent.FutureTask.run(Unknown Source)
>  at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:229)
>  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
>  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
>  at java.lang.Thread.run(Unknown Source)
> Caused by: org.apache.solr.common.SolrException: Unable to create core [VCloud_shard1_replica1]
>  at org.apache.solr.core.CoreContainer.create(CoreContainer.java:933)
>  at org.apache.solr.core.CoreContainer.lambda$load$5(CoreContainer.java:553)
>  at com.codahale.metrics.InstrumentedExecutorService$InstrumentedCallable.call(InstrumentedExecutorService.java:197)
>  ... 5 more
> Caused by: org.apache.solr.common.SolrException: Error Instantiating Update Handler, solr.DirectUpdateHandler2 failed to instantiate org.apache.solr.update.UpdateHandler
>  at org.apache.solr.core.SolrCore.<init>(SolrCore.java:965)
>  at org.apache.solr.core.SolrCore.<init>(SolrCore.java:831)
>  at org.apache.solr.core.CoreContainer.create(CoreContainer.java:918)
>  ... 7 more
> Caused by: org.apache.solr.common.SolrException: Error Instantiating Update Handler, solr.DirectUpdateHandler2 failed to instantiate org.apache.solr.update.UpdateHandler
>  at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:775)
>  at org.apache.solr.core.SolrCore.createUpdateHandler(SolrCore.java:823)
>  at org.apache.solr.core.SolrCore.initUpdateHandler(SolrCore.java:1071)
>  at org.apache.solr.core.SolrCore.<init>(SolrCore.java:936)
>  ... 9 more
> Caused by: java.lang.reflect.InvocationTargetException
>  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>  at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
>  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
>  at java.lang.reflect.Constructor.newInstance(Unknown Source)
>  at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:761)
>  ... 12 more
> Caused by: java.lang.StackOverflowError
>  at org.apache.solr.common.util.JavaBinCodec.readVInt(JavaBinCodec.java:998)
>  at org.apache.solr.common.util.JavaBinCodec.readMap(JavaBinCodec.java:612)
>  at org.apache.solr.common.util.JavaBinCodec.readObject(JavaBinCodec.java:298)
> etc......
> ...
> After this happens it won't do any more work on this shard and the main page in solr displays:
> "VCloud_shard1_replica1: org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Error Instantiating Update Handler, solr.DirectUpdateHandler2 failed to instantiate org.apache.solr.update.UpdateHandler"
>  
> Based on the execption and the huge repeating StackOverflowError we believe the tlog is corrupt and missing e.g. an end tag. 
>  
>  



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