[ 
https://issues.apache.org/jira/browse/SOLR-12063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Amrit Sarkar updated SOLR-12063:
--------------------------------
    Description: 
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}

  was: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.


> 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
>            Reporter: Amrit Sarkar
>            Priority: Major
>         Attachments: SOLR-12063.patch
>
>
> 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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