[jira] [Created] (CASSANDRA-5612) NPE when upgrading a mixed version 1.1/1.2 cluster fully to 1.2

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

Ryan McGuire created CASSANDRA-5612:
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             Summary: NPE when upgrading a mixed version 1.1/1.2 cluster fully to 1.2
                 Key: CASSANDRA-5612
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5612
             Project: Cassandra
          Issue Type: Bug
    Affects Versions: 1.2.6
            Reporter: Ryan McGuire
         Attachments: logs.tar.gz, upgrade_through_versions_test.py

See the attached upgrade_through_versions_test.py upgrade_test_mixed().

Conceptually this method does the following:

* Instantiates a 3 node 1.1.9 cluster
* Writes some data
* Shuts down node 1 and upgrades it to 1.2 (HEAD)
* Brings the node1 back up, making a the cluster a mixed version 1.1/1.2
* Brings down node2 and node3 and does the same upgrade making it all the same version.
* At this point, I would run upgradesstables on each of the nodes, but there is already an error on node3 directly after it's upgrade:

{code}
INFO [FlushWriter:1] 2013-06-03 22:49:46,543 Memtable.java (line 461) Writing Memtable-peers@1023263314(237/237 serialized/live bytes, 14 op
s)
 INFO [FlushWriter:1] 2013-06-03 22:49:46,556 Memtable.java (line 495) Completed flushing /tmp/dtest-YqMtHN/test/node3/data/system/peers/syst
em-peers-ic-2-Data.db (291 bytes) for commitlog position ReplayPosition(segmentId=1370314185862, position=58616)
 INFO [GossipStage:1] 2013-06-03 22:49:46,568 StorageService.java (line 1330) Node /127.0.0.2 state jump to normal
ERROR [MigrationStage:1] 2013-06-03 22:49:46,655 CassandraDaemon.java (line 192) Exception in thread Thread[MigrationStage:1,5,main]
java.lang.NullPointerException
        at org.apache.cassandra.db.DefsTable.addColumnFamily(DefsTable.java:511)
        at org.apache.cassandra.db.DefsTable.mergeColumnFamilies(DefsTable.java:445)
        at org.apache.cassandra.db.DefsTable.mergeSchema(DefsTable.java:355)
        at org.apache.cassandra.db.DefinitionsUpdateVerbHandler$1.runMayThrow(DefinitionsUpdateVerbHandler.java:55)
        at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:722)
{code}

This error is repeatable, but inconsistent. Interestingly, it is always node3 with the error.

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