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https://issues.apache.org/jira/browse/GEODE-8652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17221691#comment-17221691
]
ASF GitHub Bot commented on GEODE-8652:
---------------------------------------
Bill commented on a change in pull request #5666:
URL: https://github.com/apache/geode/pull/5666#discussion_r512967980
##########
File path:
geode-core/src/main/java/org/apache/geode/internal/net/NioSslEngine.java
##########
@@ -315,50 +317,48 @@ public ByteBuffer ensureWrappedCapacity(int amount,
ByteBuffer wrappedBuffer,
}
@Override
- public ByteBuffer readAtLeast(SocketChannel channel, int bytes,
+ public ByteBufferSharing readAtLeast(SocketChannel channel, int bytes,
ByteBuffer wrappedBuffer) throws IOException {
- if (peerAppData.capacity() > bytes) {
- // we already have a buffer that's big enough
- if (peerAppData.capacity() - peerAppData.position() < bytes) {
- peerAppData.compact();
- peerAppData.flip();
- }
- }
+ try (final ByteBufferSharing inputSharing = shareInputBuffer()) {
- while (peerAppData.remaining() < bytes) {
- wrappedBuffer.limit(wrappedBuffer.capacity());
- int amountRead = channel.read(wrappedBuffer);
- if (amountRead < 0) {
- throw new EOFException();
+ ByteBuffer peerAppData = inputSharing.getBuffer();
+
+ if (peerAppData.capacity() > bytes) {
+ // we already have a buffer that's big enough
+ if (peerAppData.capacity() - peerAppData.position() < bytes) {
+ peerAppData.compact();
+ peerAppData.flip();
+ }
}
- if (amountRead > 0) {
- wrappedBuffer.flip();
- // prep the decoded buffer for writing
- peerAppData.compact();
- peerAppData = unwrap(wrappedBuffer);
- // done writing to the decoded buffer - prep it for reading again
- peerAppData.flip();
+
+ while (peerAppData.remaining() < bytes) {
+ wrappedBuffer.limit(wrappedBuffer.capacity());
+ int amountRead = channel.read(wrappedBuffer);
+ if (amountRead < 0) {
+ throw new EOFException();
+ }
+ if (amountRead > 0) {
+ wrappedBuffer.flip();
+ // prep the decoded buffer for writing
+ peerAppData.compact();
+ try (final ByteBufferSharing inputSharing2 = unwrap(wrappedBuffer)) {
+ // done writing to the decoded buffer - prep it for reading again
+ final ByteBuffer peerAppDataNew = inputSharing2.getBuffer();
+ peerAppDataNew.flip();
+ peerAppData = peerAppDataNew; // loop needs new reference!
+ }
+ }
}
+ return shareInputBuffer();
}
- return peerAppData;
}
@Override
- public ByteBuffer getUnwrappedBuffer(ByteBuffer wrappedBuffer) {
- return peerAppData;
- }
-
- /**
- * ensures that the unwrapped buffer associated with the given wrapped
buffer has
- * sufficient capacity for the given amount of bytes. This may compact the
- * buffer or it may return a new buffer.
- */
- public ByteBuffer ensureUnwrappedCapacity(int amount) {
- // for TTLS the app-data buffers do not need to be tracked direct-buffers
since we
- // do not use them for I/O operations
- peerAppData =
- bufferPool.expandReadBufferIfNeeded(TRACKED_RECEIVER, peerAppData,
amount);
- return peerAppData;
+ public ByteBufferSharing getUnwrappedBuffer(ByteBuffer wrappedBuffer) {
+ /*
+ * TODO: it can't be right that we ignore the wrappedBuffer parameter here!
Review comment:
Resolved and removed. We eliminated the parameter entirely.
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> member hung in Connection.notifyHandshakeWaiter() during disconnect waiting
> for a lock held by another thread in Connection.readAck()
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: GEODE-8652
> URL: https://issues.apache.org/jira/browse/GEODE-8652
> Project: Geode
> Issue Type: Bug
> Components: membership, messaging
> Affects Versions: 1.14.0
> Reporter: Bill Burcham
> Assignee: Bill Burcham
> Priority: Major
> Labels: pull-request-available
>
> An application encountered the following hang in a TLS-enabled cluster.
> Let's call the cluster members ds3 -> ds1.
> ds3 sends a {{PutAllPRMessage}} to ds1 and is stuck in
> {{SocketChannel.read()}} waiting for the acknowledgement.
> {{ClusterDistributionManager.uncleanShutdown()}} is invoked on ds3 to shut
> the member down. That thread blocks trying to acquire a lock on the
> {{NioSslEngine}} held by the first thread (the one doing waiting for the ack
> to the put-all.)
> Somehow the shutdown thread must be allowed to proceed.
> Here's the hung thread in ds3 (a.k.a. vm_3_thr_34_dataStore3_host1_8592)
> trying to shut down the member but it's stuck waiting for the monitor on the
> {{NioSslEngine}}:
> {noformat}
> "vm_3_thr_34_dataStore3_host1_8592" #795 daemon prio=5 os_prio=0
> tid=0x00007fdb9c011000 nid=0x2fcc waiting for monitor entry
> [0x00007fdb6f4b7000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> org.apache.geode.internal.tcp.Connection.notifyHandshakeWaiter(Connection.java:804)
> - waiting to lock <0x00000000f2635b28> (a
> org.apache.geode.internal.net.NioSslEngine)
> at org.apache.geode.internal.tcp.Connection.close(Connection.java:1350)
> at
> org.apache.geode.internal.tcp.Connection.closePartialConnect(Connection.java:1278)
> 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.close(ConnectionTable.java:661)
> - locked <0x00000000f2678cf8> (a java.util.ArrayList)
> - locked <0x00000000f1187348> (a java.util.concurrent.ConcurrentHashMap)
> at org.apache.geode.internal.tcp.TCPConduit.stop(TCPConduit.java:487)
> at
> org.apache.geode.distributed.internal.direct.DirectChannel.disconnect(DirectChannel.java:644)
> - locked <0x00000000f11867a8> (a
> org.apache.geode.distributed.internal.direct.DirectChannel)
> at
> org.apache.geode.distributed.internal.DistributionImpl.disconnectDirectChannel(DistributionImpl.java:631)
> at
> org.apache.geode.distributed.internal.DistributionImpl.access$200(DistributionImpl.java:82)
> at
> org.apache.geode.distributed.internal.DistributionImpl$LifecycleListenerImpl.disconnect(DistributionImpl.java:904)
> at
> org.apache.geode.distributed.internal.membership.gms.GMSMembership$ManagerImpl.stop(GMSMembership.java:1908)
> at
> org.apache.geode.distributed.internal.membership.gms.Services.stop(Services.java:302)
> at
> org.apache.geode.distributed.internal.membership.gms.GMSMembership.shutdown(GMSMembership.java:1262)
> at
> org.apache.geode.distributed.internal.membership.gms.GMSMembership.disconnect(GMSMembership.java:1847)
> at
> org.apache.geode.distributed.internal.DistributionImpl.disconnect(DistributionImpl.java:501)
> at
> org.apache.geode.distributed.internal.ClusterDistributionManager.uncleanShutdown(ClusterDistributionManager.java:1291)
> {noformat}
> That thread is waiting on a lock held by this thread (in ds3) which is
> waiting on an acknowledgement to a PutAllPRMessage sent to ds1.
> {noformat}
> "vm_3_thr_37_dataStore3_host1_8592" #857 daemon prio=5 os_prio=0
> tid=0x00007fdb9c030800 nid=0x30d1 runnable [0x00007fdb732f0000]
> java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
> at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
> at sun.nio.ch.IOUtil.read(IOUtil.java:192)
> at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:378)
> - locked <0x00000000f2643380> (a java.lang.Object)
> at
> org.apache.geode.internal.net.NioSslEngine.readAtLeast(NioSslEngine.java:330)
> at
> org.apache.geode.internal.tcp.MsgReader.readAtLeast(MsgReader.java:129)
> at
> org.apache.geode.internal.tcp.MsgReader.readHeader(MsgReader.java:58)
> ==> - locked <0x00000000f2635b28> (a
> org.apache.geode.internal.net.NioSslEngine)
> at
> org.apache.geode.internal.tcp.Connection.readAck(Connection.java:2652)
> at
> org.apache.geode.distributed.internal.direct.DirectChannel.readAcks(DirectChannel.java:392)
> at
> org.apache.geode.distributed.internal.direct.DirectChannel.sendToMany(DirectChannel.java:342)
> at
> org.apache.geode.distributed.internal.direct.DirectChannel.sendToOne(DirectChannel.java:182)
> at
> org.apache.geode.distributed.internal.direct.DirectChannel.send(DirectChannel.java:511)
> at
> org.apache.geode.distributed.internal.DistributionImpl.directChannelSend(DistributionImpl.java:346)
> at
> org.apache.geode.distributed.internal.DistributionImpl.send(DistributionImpl.java:291)
> at
> org.apache.geode.distributed.internal.ClusterDistributionManager.sendViaMembershipManager(ClusterDistributionManager.java:2053)
> at
> org.apache.geode.distributed.internal.ClusterDistributionManager.sendOutgoing(ClusterDistributionManager.java:1981)
> at
> org.apache.geode.distributed.internal.ClusterDistributionManager.sendMessage(ClusterDistributionManager.java:2018)
> at
> org.apache.geode.distributed.internal.ClusterDistributionManager.putOutgoing(ClusterDistributionManager.java:1083)
> at
> org.apache.geode.internal.cache.partitioned.PutAllPRMessage.send(PutAllPRMessage.java:201)
> at
> org.apache.geode.internal.cache.PartitionedRegion.tryToSendOnePutAllMessage(PartitionedRegion.java:2839)
> at
> org.apache.geode.internal.cache.PartitionedRegion.sendMsgByBucket(PartitionedRegion.java:2621)
> at
> org.apache.geode.internal.cache.PartitionedRegion.postPutAllSend(PartitionedRegion.java:2392)
> at
> org.apache.geode.internal.cache.LocalRegionDataView.postPutAll(LocalRegionDataView.java:361)
> at
> org.apache.geode.internal.cache.LocalRegion.basicPutAll(LocalRegion.java:9154)
> at
> org.apache.geode.internal.cache.LocalRegion.putAll(LocalRegion.java:8903)
> {noformat}
> What we see is that the {{MsgReader}} in the second thread is not letting the
> first thread close the socket. Until the socket is closed, the second thread
> will be stuck in {{SocketChannel.read()}}.
> *But why is the second thread stuck in {{SocketChannelImpl.read}}? That may
> be due to GEODE-8651!*
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