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https://issues.apache.org/jira/browse/GEODE-8238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17205091#comment-17205091
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ASF subversion and git services commented on GEODE-8238:
--------------------------------------------------------
Commit dff5b2b938b73455426db8ad895a84d2a8599538 in geode's branch
refs/heads/support/1.12 from Bruce Schuchardt
[ https://gitbox.apache.org/repos/asf?p=geode.git;h=dff5b2b ]
GEODE-8238: message loss during shutdown in Shutdown Hook when JVM exits (#5232)
Remove invocation of removeEndpoint when a shared/unordered connection
shuts down. Endpoint cleanup is already initiated by DistributionImpl
during membership view installation, so it isn't needed here.
(cherry picked from commit ece3a5a6c045075509a5097054e33a64d4194fae)
Also resolved compilation errors after the cherry-pick.
> message loss during shutdown in Shutdown Hook when JVM exits
> ------------------------------------------------------------
>
> Key: GEODE-8238
> URL: https://issues.apache.org/jira/browse/GEODE-8238
> Project: Geode
> Issue Type: Bug
> Components: membership, messaging
> Reporter: Bruce J Schuchardt
> Priority: Major
> Fix For: 1.13.0, 1.14.0
>
>
> In a test I was running a JVM was told to exit and Geode's Shutdown Hook
> initiated cache shutdown. This thread hung once in a while either waiting
> for a reply to a release of a distributed lock or for a reply to a
> region-destroy message.
> I traced this down by adding some logging to TCPConduit and DirectChannel and
> it's due to the changes for GEODE-7727 ("modify sender thread to detect
> relese of connection"). Those changes cause the P2P Handshake thread to stay
> active reading from a shared Connection socket. Unfortunately, when this
> thread eventually exits it is invoking removeEndpoint, which closes all the
> other connections to the other node. This is causing messages to be lost.
> Here's an example:
> one node (19919) fails to form a connection and invokes removeEndpoint for
> the other node (23898)
> {noformat}
> bridgegemfire1_19919/system.log: [info 2020/06/09 11:05:08.862 PDT <P2P
> handshake reader@31e492f-45> tid=0x14f] BRUCE: asyncClose closing Connection,
> uid=4 shared=true ordered=false
> remoteAddr=rs-Awesome-14-1023a0i3xlarge-hydra-client-8(bridgegemfire4_host1_23898:23898)<ec><v13>:41005
> isReceiver=true
> java.lang.Exception: stack trace
> at
> org.apache.geode.internal.tcp.Connection.asyncClose(Connection.java:833)
> at org.apache.geode.internal.tcp.Connection.close(Connection.java:1338)
> at
> org.apache.geode.internal.tcp.Connection.closePartialConnect(Connection.java:1276)
> at
> org.apache.geode.internal.tcp.ConnectionTable.closeCon(ConnectionTable.java:612)
> at
> org.apache.geode.internal.tcp.ConnectionTable.closeCon(ConnectionTable.java:604)
> at
> org.apache.geode.internal.tcp.ConnectionTable.removeEndpoint(ConnectionTable.java:851)
> at
> org.apache.geode.internal.tcp.ConnectionTable.removeEndpoint(ConnectionTable.java:751)
> at org.apache.geode.internal.tcp.Connection.close(Connection.java:1400)
> at
> org.apache.geode.internal.tcp.Connection.requestClose(Connection.java:1268)
> at
> org.apache.geode.internal.tcp.Connection.readMessages(Connection.java:1661)
> at org.apache.geode.internal.tcp.Connection.run(Connection.java:1460)
> at java.base/java.lang.Thread.run(Thread.java:834)
> {noformat}
> The other node's shared/unordered connection was unexpectedly terminated,
> causing it to also invoke removeEndpoint():
> {noformat}
> bridgegemfire4_23898/system.log: [info 2020/06/09 11:05:08.862 PDT <P2P
> handshake reader@2e1ef958-4> tid=0x36] BRUCE: asyncClose closing Connection,
> uid=4 shared=true ordered=false
> remoteAddr=rs-Awesome-14-1023a0i3xlarge-hydra-client-8(bridgegemfire1_host1_19919:19919)<ec><v1>:41002
> isReceiver=false
> java.lang.Exception: stack trace
> at
> org.apache.geode.internal.tcp.Connection.asyncClose(Connection.java:833)
> at org.apache.geode.internal.tcp.Connection.close(Connection.java:1338)
> at
> org.apache.geode.internal.tcp.Connection.requestClose(Connection.java:1268)
> at
> org.apache.geode.internal.tcp.Connection.readMessages(Connection.java:1619)
> at org.apache.geode.internal.tcp.Connection.run(Connection.java:1460)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> at java.base/java.lang.Thread.run(Thread.java:834)
> bridgegemfire4_23898/system.log: [info 2020/06/09 11:05:08.862 PDT <P2P
> handshake reader@2e1ef958-4> tid=0x36] BRUCE: removeEndpoint invoked for
> rs-Awesome-14-1023a0i3xlarge-hydra-client-8(bridgegemfire1_host1_19919:19919)<ec><v1>:41002
> reason=SocketChannel.read returned EOF notifyDisconnect=true
> java.lang.Exception: stack trace
> at
> org.apache.geode.internal.tcp.ConnectionTable.removeEndpoint(ConnectionTable.java:758)
> at
> org.apache.geode.internal.tcp.ConnectionTable.removeEndpoint(ConnectionTable.java:751)
> at org.apache.geode.internal.tcp.Connection.close(Connection.java:1400)
> at
> org.apache.geode.internal.tcp.Connection.requestClose(Connection.java:1268)
> at
> org.apache.geode.internal.tcp.Connection.readMessages(Connection.java:1619)
> at org.apache.geode.internal.tcp.Connection.run(Connection.java:1460)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> at java.base/java.lang.Thread.run(Thread.java:834)
> {noformat}
> An unordered message like a Reply can be lost in this case if it is written
> to the Connection's socket but one of these background threads then closes
> the socket.
> Here the logs show a reply being sent on a Connection with a UID (unique ID)
> of 69. The message is never received because, as you can see, the other node
> closes the socket for Connection with UID 69.
> {noformat}
> bridgegemfire4_23898/system.log: [info 2020/06/09 11:05:09.906 PDT <Pooled
> Waiting Message Processor 3> tid=0x60] BRUCE: sending
> DLockReleaseReplyMessage (serviceName=__PRLS; replyCode=OK;
> sender=rs-Awesome-14-1023a0i3xlarge-hydra-client-8(bridgegemfire4_host1_23898:23898)<ec><v13>:41005;
> processorId=212756) to
> [rs-Awesome-14-1023a0i3xlarge-hydra-client-8(bridgegemfire1_host1_19919:19919)<ec><v1>:41002(uid=69)]
> bridgegemfire1_19919/system.log: [info 2020/06/09 11:05:09.907 PDT <P2P
> handshake reader@2c6c307c-65> tid=0x1b0] BRUCE: asyncClose closing
> Connection, uid=69 shared=true ordered=false
> remoteAddr=rs-Awesome-14-1023a0i3xlarge-hydra-client-8(bridgegemfire4_host1_23898:23898)<ec><v13>:41005
> isReceiver=true
> java.lang.Exception: stack trace
> at
> org.apache.geode.internal.tcp.Connection.asyncClose(Connection.java:833)
> at org.apache.geode.internal.tcp.Connection.close(Connection.java:1338)
> at
> org.apache.geode.internal.tcp.Connection.closePartialConnect(Connection.java:1276)
> at
> org.apache.geode.internal.tcp.ConnectionTable.closeCon(ConnectionTable.java:612)
> at
> org.apache.geode.internal.tcp.ConnectionTable.closeCon(ConnectionTable.java:604)
> at
> org.apache.geode.internal.tcp.ConnectionTable.removeEndpoint(ConnectionTable.java:851)
> at
> org.apache.geode.internal.tcp.ConnectionTable.removeEndpoint(ConnectionTable.java:751)
> at org.apache.geode.internal.tcp.Connection.close(Connection.java:1400)
> at
> org.apache.geode.internal.tcp.Connection.requestClose(Connection.java:1268)
> at
> org.apache.geode.internal.tcp.Connection.readMessages(Connection.java:1619)
> at org.apache.geode.internal.tcp.Connection.run(Connection.java:1460)
> at java.base/java.lang.Thread.run(Thread.java:834)
> {noformat}
> I don't think Connection termination should be invoking removeEndpoint at
> all. Endpoints should only be removed in response to membership changes.
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