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https://issues.apache.org/jira/browse/SOLR-12063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16398115#comment-16398115
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Varun Thacker commented on SOLR-12063:
--------------------------------------

Okay let's commit SOLR-12083 first and then use the randomization from there to 
TestStressRecovery as part of this patch ? 

> Fix tlog entry indexes in UpdateLog for CDCR to work smoothly.
> --------------------------------------------------------------
>
>                 Key: SOLR-12063
>                 URL: https://issues.apache.org/jira/browse/SOLR-12063
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: CDCR
>    Affects Versions: 7.2, 7.2.1
>            Reporter: Amrit Sarkar
>            Assignee: Varun Thacker
>            Priority: Major
>         Attachments: SOLR-12063.patch, SOLR-12063.patch, SOLR-12063.patch, 
> SOLR-12063.patch, test-report-PeerSyncTest, test-report-TestStressRecovery
>
>
> In *UpdateLog*, {{RecentUpdates}} reads the entry of tlogs, and throughout 
> the project the entry indexes for various operations are consistent, but odd 
> in this part. As we included new entry in TransactionLog for CDCR, read 
> operations in {{update()}} method of {{RecentUpdates}} throw error rightfully 
> as elements are read from wrong indexes of tlog entry. The entry indexes of 
> llog should be consistent throughout.
> {code}
>   [beaster]   2> 27394 WARN  (qtp97093533-72) [n:127.0.0.1:44658_solr 
> c:cdcr-cluster1 s:shard1 r:core_node3 x:cdcr-cluster1_shard1_replica_n1] 
> o.a.s.u.UpdateLog Unexpected log entry or corrupt log.  Entry=[2, 
> -1594312216007409664, [B@28e6859c, true]
>   [beaster]   2> java.lang.ClassCastException: java.lang.Boolean cannot be 
> cast to [B
>   [beaster]   2>      at 
> org.apache.solr.update.UpdateLog$RecentUpdates.update(UpdateLog.java:1443)
>   [beaster]   2>      at 
> org.apache.solr.update.UpdateLog$RecentUpdates.<init>(UpdateLog.java:1340)
>   [beaster]   2>      at 
> org.apache.solr.update.UpdateLog.getRecentUpdates(UpdateLog.java:1513)
>   [beaster]   2>      at 
> org.apache.solr.handler.CdcrRequestHandler.handleShardCheckpointAction(CdcrRequestHandler.java:448)
>   [beaster]   2>      at 
> org.apache.solr.handler.CdcrRequestHandler.handleRequestBody(CdcrRequestHandler.java:198)
>   [beaster]   2>      at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:195)
>   [beaster]   2>      at 
> org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>   [beaster]   2>      at 
> org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:711)
>   [beaster]   2>      at 
> org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:517)
>   [beaster]   2>      at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:384)
>   [beaster]   2>      at 
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:330)
>   [beaster]   2>      at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
>   [beaster]   2>      at 
> org.apache.solr.client.solrj.embedded.JettySolrRunner$DebugFilter.doFilter(JettySolrRunner.java:139)
>   [beaster]   2>      at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
>   [beaster]   2>      at 
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
>   [beaster]   2>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
>   [beaster]   2>      at 
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
>   [beaster]   2>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
>   [beaster]   2>      at 
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
>   [beaster]   2>      at 
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
>   [beaster]   2>      at 
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
>   [beaster]   2>      at 
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
> {code}



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