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From "Tyler Hobbs (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-9460) NullPointerException Creating Digest
Date Fri, 22 May 2015 17:58:18 GMT
Tyler Hobbs created CASSANDRA-9460:

             Summary: NullPointerException Creating Digest
                 Key: CASSANDRA-9460
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Tyler Hobbs
            Assignee: Stefania
             Fix For: 2.1.x
         Attachments: node2.log

In the {{consistency_test.TestConsistency.short_read_test}} dtest against cassandra-2.1, the
following error occured:

ERROR [ReadRepairStage:3] 2015-05-22 16:35:25,034 - Exception in
thread Thread[ReadRepairStage:3,5,main]
java.lang.NullPointerException: null
    at org.apache.cassandra.db.ColumnFamily.updateDigest( ~[main/:na]
    at org.apache.cassandra.db.ColumnFamily.digest( ~[main/:na]
    at org.apache.cassandra.service.RowDigestResolver.resolve( ~[main/:na]
    at org.apache.cassandra.service.RowDigestResolver.resolve( ~[main/:na]
    at org.apache.cassandra.service.ReadCallback$
    at java.util.concurrent.ThreadPoolExecutor.runWorker( ~[na:1.7.0_80]
    at java.util.concurrent.ThreadPoolExecutor$ ~[na:1.7.0_80]
    at ~[na:1.7.0_80]

>From a glance at the code in the stacktrace, it looks like there was a null cell in the
ColumnFamily that we were creating a digest of.  This error is probably particular to "short

Here's the failing test:
 I've attached the logs for the node with the error.

We saw this issue against 2.1, but the problem may also exist with 2.0 and/or 2.2.

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