https://bz.apache.org/bugzilla/show_bug.cgi?id=58624
Barry Coughlan <b.coughl...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
OS| |All
--- Comment #1 from Barry Coughlan <b.coughl...@gmail.com> ---
I mistakenly thought that packets sent with getBasicRemote() were sent on the
same thread.
To add, all of the threads for sending messages are in the state of waiting for
tasks - none of them are blocked:
"WebSocketServer-localhost-/MyApp-1453" - Thread t@13892
java.lang.Thread.State: TIMED_WAITING
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <785b947d> (a
java.util.concurrent.SynchronousQueue$TransferStack)
at java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(Unknown
Source)
at java.util.concurrent.SynchronousQueue$TransferStack.transfer(Unknown
Source)
at java.util.concurrent.SynchronousQueue.poll(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Locked ownable synchronizers:
- None
Some other things that might be relevant from looking at the code:
- We don't call the sendPing() or sendText() methods, only sendObject().
- We don't use partial message decoding/encoding.
- Batching is not enabled.
- Looking at a heap dump, the only reference to the FutureSendHandler from the
stuck thread is in the ConcurrentHashMap in
org.apache.tomcat.websocket.WsSession.futures
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