https://issues.apache.org/bugzilla/show_bug.cgi?id=55200
Bug ID: 55200
Summary: [websocket] Problem writing many subsequent binary
messages
Product: Tomcat 8
Version: trunk
Hardware: Other
OS: Linux
Status: NEW
Severity: major
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
I see sometimes failing connections due to IOException (see below).
This happens when trying to send thousands of binary messages (1024 bytes each)
without any delay between the subsequent messages.
Having look at the code in AsyncChannelWrapperSecure$WriteTask.run(219), I
think it is not correct to assume that if not all of the bytes in the buffer
are written, this shall produce IOException. I think in this case, there shall
be an attempt to write the rest of the bytes in a cycle.
Here one exception I got during the test:
Exception is :java.io.IOException: java.util.concurrent.ExecutionException:
java.io.IOException: Only wrote [460] of [1,098] bytes
at
org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:204)
at
org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendBytes(WsRemoteEndpointImplBase.java:113)
at
org.apache.tomcat.websocket.WsRemoteEndpointBasic.sendBinary(WsRemoteEndpointBasic.java:43)
at WebsocketsTestManager$TestThread.run(WebsocketsTestManager.java:271)
Caused by: java.util.concurrent.ExecutionException: java.io.IOException: Only
wrote [460] of [1,098] bytes
at
org.apache.tomcat.websocket.WsRemoteEndpointImplBase$FutureToSendHandler.get(WsRemoteEndpointImplBase.java:729)
at
org.apache.tomcat.websocket.WsRemoteEndpointImplBase.startMessageBlock(WsRemoteEndpointImplBase.java:202)
... 3 more
Caused by: java.io.IOException: Only wrote [460] of [1,098] bytes
at
org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WriteTask.run(AsyncChannelWrapperSecure.java:220)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:789)
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