[
https://issues.apache.org/jira/browse/ZOOKEEPER-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15837276#comment-15837276
]
ASF GitHub Bot commented on ZOOKEEPER-2044:
-------------------------------------------
Github user rakeshadr commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/156#discussion_r97716640
--- Diff: src/java/test/org/apache/zookeeper/server/NIOServerCnxnTest.java
---
@@ -68,4 +74,38 @@ public void testOperationsAfterCnxnClose() throws
IOException,
zk.close();
}
}
+
+ /**
+ * Mock extension of NIOServerCnxn to test for
+ * CancelledKeyException (ZOOKEEPER-2044).
+ */
+ class MockNIOServerCnxn extends NIOServerCnxn {
+ public MockNIOServerCnxn( NIOServerCnxn cnxn )
+ throws IOException {
+ super( cnxn.zkServer, cnxn.sock, cnxn.sk, cnxn.factory );
+ }
+
+ public void mockSendBuffer(ByteBuffer bb) throws Exception {
+ super.internalSendBuffer( bb );
+ }
+ }
+
+ @Test(timeout = 30000)
+ public void testValidSelectionKey() throws Exception {
+ final ZooKeeper zk = createClient();
+ try {
+ Iterable<ServerCnxn> connections =
serverFactory.getConnections();
+ for (ServerCnxn serverCnxn : connections) {
+ MockNIOServerCnxn mock = new
MockNIOServerCnxn((NIOServerCnxn) serverCnxn);
+ // Cancel key
+ ((NIOServerCnxn)
serverCnxn).sock.keyFor(((NIOServerCnxnFactory)
serverFactory).selector).cancel();;
+ mock.mockSendBuffer( ByteBuffer.allocate(8) );
+ }
+ } catch (CancelledKeyException e) {
+ e.printStackTrace();
--- End diff --
Instead of printStackTrace, can we use LOG.error("Exception while sending
bytes!", e);
> CancelledKeyException in zookeeper 3.4.5
> ----------------------------------------
>
> Key: ZOOKEEPER-2044
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2044
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.4.6
> Environment: Red Hat Enterprise Linux Server release 6.2
> Reporter: shamjith antholi
> Assignee: Flavio Junqueira
> Priority: Minor
> Fix For: 3.4.10, 3.5.3, 3.6.0
>
> Attachments: ZOOKEEPER-2044.patch, ZOOKEEPER-2044.patch
>
>
> I am getting cancelled key exception in zookeeper (version 3.4.5). Please see
> the log below. When this error is thrown, the connected solr shard is going
> down by giving the error "Failed to index metadata in
> Solr,StackTrace=SolrError: HTTP status 503.Reason:
> {"responseHeader":{"status":503,"QTime":204},"error":{"msg":"ClusterState
> says we are the leader, but locally we don't think so","code":503" and
> ultimately the current activity is going down. Could you please give a
> solution for this ?
> Zookeper log
> ----------------------------------------------------------
> 2014-09-16 02:58:47,799 [myid:1] - INFO
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@832] - Client
> attempting to renew session 0x24868e7ca980003 at /172.22.0.5:58587
> 2014-09-16 02:58:47,800 [myid:1] - INFO
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:Learner@107] - Revalidating
> client: 0x24868e7ca980003
> 2014-09-16 02:58:47,802 [myid:1] - INFO
> [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:ZooKeeperServer@588] - Invalid
> session 0x24868e7ca980003 for client /172.22.0.5:58587, probably expired
> 2014-09-16 02:58:47,803 [myid:1] - INFO
> [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1001] - Closed
> socket connection for client /172.22.0.5:58587 which had sessionid
> 0x24868e7ca980003
> 2014-09-16 02:58:47,810 [myid:1] - ERROR
> [CommitProcessor:1:NIOServerCnxn@180] - Unexpected Exception:
> java.nio.channels.CancelledKeyException
> at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55)
> at sun.nio.ch.SelectionKeyImpl.interestOps(SelectionKeyImpl.java:59)
> at
> org.apache.zookeeper.server.NIOServerCnxn.sendBuffer(NIOServerCnxn.java:153)
> at
> org.apache.zookeeper.server.NIOServerCnxn.sendResponse(NIOServerCnxn.java:1076)
> at
> org.apache.zookeeper.server.NIOServerCnxn.process(NIOServerCnxn.java:1113)
> at org.apache.zookeeper.server.DataTree.setWatches(DataTree.java:1327)
> at
> org.apache.zookeeper.server.ZKDatabase.setWatches(ZKDatabase.java:384)
> at
> org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:304)
> at
> org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:74)
>
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