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Posted to commits@cassandra.apache.org by "Mikhail Panchenko (JIRA)" <ji...@apache.org> on 2013/09/24 22:11:06 UTC
[jira] [Created] (CASSANDRA-6089) client_only example does not work
Mikhail Panchenko created CASSANDRA-6089:
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Summary: client_only example does not work
Key: CASSANDRA-6089
URL: https://issues.apache.org/jira/browse/CASSANDRA-6089
Project: Cassandra
Issue Type: Bug
Reporter: Mikhail Panchenko
client_only example fails out of the box with:
{code}
13/09/24 11:44:53 INFO gms.Gossiper: Node /127.0.0.1 is now part of the cluster
13/09/24 11:44:53 INFO gms.Gossiper: InetAddress /127.0.0.1 is now UP
13/09/24 11:44:53 ERROR concurrent.DebuggableThreadPoolExecutor: Error in ThreadPoolExecutor
java.lang.NullPointerException
at org.apache.cassandra.service.MigrationManager.maybeScheduleSchemaPull(MigrationManager.java:113)
at org.apache.cassandra.service.MigrationManager.onAlive(MigrationManager.java:95)
at org.apache.cassandra.gms.Gossiper.markAlive(Gossiper.java:803)
at org.apache.cassandra.gms.Gossiper.handleMajorStateChange(Gossiper.java:846)
at org.apache.cassandra.gms.Gossiper.applyStateLocally(Gossiper.java:931)
at org.apache.cassandra.gms.GossipDigestAck2VerbHandler.doVerb(GossipDigestAck2VerbHandler.java:50)
at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:56)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:680)
Exception in thread "GossipStage:1" java.lang.NullPointerException
at org.apache.cassandra.service.MigrationManager.maybeScheduleSchemaPull(MigrationManager.java:113)
at org.apache.cassandra.service.MigrationManager.onAlive(MigrationManager.java:95)
at org.apache.cassandra.gms.Gossiper.markAlive(Gossiper.java:803)
at org.apache.cassandra.gms.Gossiper.handleMajorStateChange(Gossiper.java:846)
at org.apache.cassandra.gms.Gossiper.applyStateLocally(Gossiper.java:931)
at org.apache.cassandra.gms.GossipDigestAck2VerbHandler.doVerb(GossipDigestAck2VerbHandler.java:50)
at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:56)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:680)
{/code}
I've tested this both on the 1.2.8 tag and with 1.2 latest.
The line in question is
{code:java}
if (Schema.instance.getVersion().equals(theirVersion) || !shouldPullSchemaFrom(endpoint))
{/code}
Seems that {{Schema.instance.getVersion()}} returns null in the client_only case. Adding a {{Schema.instance.getVersion() == null}} as another {{||}} in the conditional appears to fix it, but I don't remember the codepaths well enough to confidently say that that's the correct thing to do.
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