Low Description
client_only example fails out of the box with:
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)
I've tested this both on the 1.2.8 tag and with 1.2 latest.
The line in question is
if (Schema.instance.getVersion().equals(theirVersion) || !shouldPullSchemaFrom(endpoint))
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.