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Posted to dev@lucene.apache.org by "David Smiley (JIRA)" <ji...@apache.org> on 2016/03/19 02:57:33 UTC

[jira] [Created] (SOLR-8875) ZkStateWriter.writePendingUpdates() can return null CollectionState; NPE in Overseer

David Smiley created SOLR-8875:
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             Summary: ZkStateWriter.writePendingUpdates() can return null CollectionState; NPE in Overseer
                 Key: SOLR-8875
                 URL: https://issues.apache.org/jira/browse/SOLR-8875
             Project: Solr
          Issue Type: Bug
          Components: SolrCloud
            Reporter: David Smiley


While trying to get the test in Varun's patch in SOLR-5750 (SolrCloud collection backup & restore) to succeed, I kept hitting an NPE in Overseer in which clusterState was null.  I added a bunch of asserts and found where it was happening which I worked around temporarily.  See https://github.com/apache/lucene-solr/commit/fd9c4d59e8dbe0e9fbd99a40ed2ff746c1ae7a0c#diff-9ed614eee66b9e685d73446b775dc043R247 which is ZkStateWriter.writePendingUpdates() returning null, overwriting the current non-null clusterState.  This happens nearly every time for me when I run that test.



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