[jira] [Created] (RATIS-103) LeaderState.updateSenders may throws UnsupportedOperationException

["Tsz Wo Nicholas Sze (JIRA)" <ji...@apache.org>]

Tsz Wo Nicholas Sze created RATIS-103:
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             Summary: LeaderState.updateSenders may throws UnsupportedOperationException
                 Key: RATIS-103
                 URL: https://issues.apache.org/jira/browse/RATIS-103
             Project: Ratis
          Issue Type: Bug
            Reporter: Tsz Wo Nicholas Sze
            Assignee: Tsz Wo Nicholas Sze
            Priority: Minor


The CopyOnWriteArrayList may not work well in LeaderState since it does not support remove.

RaftReconfigurationBaseTest.testRemovePeers() fails with UnsupportedOperationException.
{code}
Exception in thread "Thread-102" java.lang.UnsupportedOperationException
        at java.util.concurrent.CopyOnWriteArrayList$COWIterator.remove(CopyOnWriteArrayList.java:1176)
        at org.apache.ratis.server.impl.LeaderState.updateSenders(LeaderState.java:254)
        ...
{code}



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