Varun Thacker created SOLR-12229:
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Summary: Harden exception handling in CdcrUpdateLogSynchronizer
Key: SOLR-12229
URL: https://issues.apache.org/jira/browse/SOLR-12229
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Varun Thacker
In CdcrUpdateLogSynchronizer when we ask for the last processed version, if the
call fails and we don't catch the exception the synchronizer can quit.
Here's an example from a Jenkins failure
{code:java}
[junit4] 2> 2810643 WARN (cdcr-update-log-synchronizer-9646-thread-1) [ ]
o.a.s.h.CdcrUpdateLogSynchronizer Caught unexpected exception
[junit4] 2>
org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error
from server at http://127.0.0.1:45384/solr/cdcr-source_shard1_replica_n1:
SolrCore is loading
[junit4] 2> at
org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:643)
~[java/:?]
[junit4] 2> at
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:255)
~[java/:?]
[junit4] 2> at
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:244)
~[java/:?]
[junit4] 2> at
org.apache.solr.client.solrj.SolrClient.request(SolrClient.java:1219) ~[java/:?]
[junit4] 2> at
org.apache.solr.handler.CdcrUpdateLogSynchronizer$UpdateLogSynchronisation.run(CdcrUpdateLogSynchronizer.java:147)
[java/:?]
[junit4] 2> at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_162]
[junit4] 2> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
[?:1.8.0_162]
[junit4] 2> at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
[?:1.8.0_162]
[junit4] 2> at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
[?:1.8.0_162]
[junit4] 2> at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_162]
[junit4] 2> at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_162]
[junit4] 2> at java.lang.Thread.run(Thread.java:748) [?:1.8.0_162]{code}
We should audit the code usage and then harden the failure scenarios and deal
with it more gracefully
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