Race condition during decommission
----------------------------------
Key: CASSANDRA-2072
URL: https://issues.apache.org/jira/browse/CASSANDRA-2072
Project: Cassandra
Issue Type: Bug
Components: Core
Affects Versions: 0.7.0
Reporter: Brandon Williams
Priority: Minor
Occasionally when decommissioning a node, there is a race condition that occurs
where another node will never remove the token and thus propagate it again with
a state of down. With CASSANDRA-1900 we can solve this, but it shouldn't occur
in the first place.
Given nodes A, B, and C, if you decommission B it will stream to A and C. When
complete, B will decommission and receive this stacktrace:
ERROR 00:02:40,282 Fatal exception in thread Thread[Thread-5,5,main]
java.util.concurrent.RejectedExecutionException: ThreadPoolExecutor has shut
down
at
org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor$1.rejectedExecution(DebuggableThreadPoolExecutor.java:62)
at
java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:767)
at
java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:658)
at
org.apache.cassandra.net.MessagingService.receive(MessagingService.java:387)
at
org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:91
At this point A will show it is removing B's token, but C will not and instead
it's failure detector will report that B is dead, and nodetool ring on C shows
A in a leaving/down state. In another gossip round, C will propagate this
state back to A.
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