[jira] [Created] (SOLR-6775) Creating backup snapshot null pointer exception

["Ryan Hesson (JIRA)" <ji...@apache.org>]

Ryan Hesson created SOLR-6775:
---------------------------------

             Summary: Creating backup snapshot null pointer exception
                 Key: SOLR-6775
                 URL: https://issues.apache.org/jira/browse/SOLR-6775
             Project: Solr
          Issue Type: Bug
          Components: replication (java)
    Affects Versions: 4.10
         Environment: Linux Server, Java version "1.7.0_21", Solr version 4.10.0
            Reporter: Ryan Hesson


I set up Solr Replication. I have one master on a server, one slave on another server. The replication of data appears functioning correctly. The issue is when the master SOLR tries to create a snapshot backup it gets a null pointer exception. 

org.apache.solr.handler.SnapShooter createSnapshot method calls org.apache.solr.handler.SnapPuller.delTree(snapShotDir); at line 162 and the exception happens within  org.apache.solr.handler.SnapPuller at line 1026 because snapShotDir is null. 
Here is the actual log output:

58319963 [qtp12610551-16] INFO  org.apache.solr.core.SolrCore  - newest commit generation = 349
58319983 [Thread-19] INFO  org.apache.solr.handler.SnapShooter  - Creating backup snapshot...
Exception in thread "Thread-19" java.lang.NullPointerException
        at org.apache.solr.handler.SnapPuller.delTree(SnapPuller.java:1026)
        at org.apache.solr.handler.SnapShooter.createSnapshot(SnapShooter.java:162)
        at org.apache.solr.handler.SnapShooter$1.run(SnapShooter.java:91)

I may have missed how to set the directory in the documentation but I've looked around without much luck. I thought the process was to use the same directory as the index data for the snapshots. Is this a known issue with this release or am I missing how to set the value? If someone could tell me how to set snapshotdir or confirm that it is an issue and a different way of backing up the index is needed it would be much appreciated. 



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