Brandon Williams created CASSANDRA-16588:
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Summary: NPE getting host_id in Gossiper.isSafeForStartup
Key: CASSANDRA-16588
URL: https://issues.apache.org/jira/browse/CASSANDRA-16588
Project: Cassandra
Issue Type: Bug
Reporter: Brandon Williams
As seen here:
https://ci-cassandra.apache.org/job/Cassandra-devbranch/604/testReport/junit/org.apache.cassandra.distributed.upgrade/MixedModeGossipTest/testStatusFieldShouldExistInOldVersionNodesEdgeCase/
{noformat}
java.lang.NullPointerException
at org.apache.cassandra.gms.Gossiper.isSafeForStartup(Gossiper.java:952)
at
org.apache.cassandra.service.StorageService.checkForEndpointCollision(StorageService.java:657)
at
org.apache.cassandra.service.StorageService.prepareToJoin(StorageService.java:933)
at
org.apache.cassandra.service.StorageService.initServer(StorageService.java:784)
at
org.apache.cassandra.service.StorageService.initServer(StorageService.java:729)
at
org.apache.cassandra.distributed.impl.Instance.lambda$startup$10(Instance.java:541)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
{noformat}
I believe what is happening is a GossipDigestAck has been queued to ack the
shutdown state from the node on the seed, but isn't actually sent until the
node has restarted and gone into shadow. Since the ack contains the node's IP,
it assumes a host_id will be there but since this is not an actual shadow
response, it is not.
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