https://bz.apache.org/bugzilla/show_bug.cgi?id=66482
Bug ID: 66482
Summary: Nio2 websocket timeout cause the response is no longer
possible, always pending
Product: Tomcat 8
Version: 8.5.84
Hardware: PC
Status: NEW
Severity: major
Priority: P2
Component: WebSocket
Assignee: dev@tomcat.apache.org
Reporter: zhougang6...@gmail.com
Target Milestone: ----
In an update of Tomcat (8.5.54 -- 8.5.84), we found in the test that the server
could not respond to HTTP requests, some requests were in Pending state and
some were normal. This situation persists and you can only restart Tomcat.
After testing, we determined that the problem was caused by the version
upgrade, and it only occurred in the server.xml configuration Nio2, and the
configuration for Nio did not have this problem.
Nio2 configured to: server XML Connector set protocol to org. Apache. Coyote.
Http11. Http11Nio2Protocol
A ThreadLocal variable called inlineCompletion in Nio2Endpoint.java has an
exception to the run method between startInline and endInline, which results in
endInline not executing. The variable state is true. In the
readCompletionHandler completed, the Nio2Endpoint.isInline() result is always
true, and the thread will no longer execute getEndpoint().processsocket.
Here is the stack that causes this problem:
java.lang.IllegalStateException: Writing not allowed due to timeout or
cancellation
at
sun.nio.ch.AsynchronousSocketChannelImpl.write(AsynchronousSocketChannelImpl.java:350)
at
sun.nio.ch.AsynchronousSocketChannelImpl.write(AsynchronousSocketChannelImpl.java:416)
at org.apache.tomcat.util.net.Nio2Channel.write(Nio2Channel.java:184)
at
org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$Nio2OperationState.run(Nio2Endpoint.java:1098)
at
org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$Nio2OperationState.start(Nio2Endpoint.java:1040)
at
org.apache.tomcat.util.net.SocketWrapperBase.vectoredOperation(SocketWrapperBase.java:1469)
at
org.apache.tomcat.util.net.SocketWrapperBase.write(SocketWrapperBase.java:1395)
at
org.apache.tomcat.util.net.SocketWrapperBase.write(SocketWrapperBase.java:1366)
at
org.apache.tomcat.websocket.server.WsRemoteEndpointImplServer.doWrite(WsRemoteEndpointImplServer.java:93)
at
org.apache.tomcat.websocket.WsRemoteEndpointImplBase.writeMessagePart(WsRemoteEndpointImplBase.java:512)
at
org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendMessageBlock(WsRemoteEndpointImplBase.java:314)
at
org.apache.tomcat.websocket.WsRemoteEndpointImplBase.sendMessageBlock(WsRemoteEndpointImplBase.java:262)
at org.apache.tomcat.websocket.WsSession.sendCloseMessage(WsSession.java:824)
at org.apache.tomcat.websocket.WsSession.onClose(WsSession.java:747)
at
org.apache.tomcat.websocket.WsFrameBase.processDataControl(WsFrameBase.java:367)
at org.apache.tomcat.websocket.WsFrameBase.processData(WsFrameBase.java:296)
at
org.apache.tomcat.websocket.WsFrameBase.processInputBuffer(WsFrameBase.java:133)
at
org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:85)
at
org.apache.tomcat.websocket.server.WsFrameServer.doOnDataAvailable(WsFrameServer.java:183)
at
org.apache.tomcat.websocket.server.WsFrameServer.notifyDataAvailable(WsFrameServer.java:162)
at
org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.upgradeDispatch(WsHttpUpgradeHandler.java:157)
at
org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.dispatch(UpgradeProcessorInternal.java:60)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:59)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:885)
at
org.apache.tomcat.util.net.Nio2Endpoint$SocketProcessor.doRun(Nio2Endpoint.java:1725)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
org.apache.tomcat.util.net.AbstractEndpoint.processSocket(AbstractEndpoint.java:1184)
at
org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$2.completed(Nio2Endpoint.java:637)
at
org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$2.completed(Nio2Endpoint.java:615)
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:281)
at
sun.nio.ch.WindowsAsynchronousSocketChannelImpl$ReadTask.completed(WindowsAsynchronousSocketChannelImpl.java:579)
at sun.nio.ch.Iocp$EventHandlerTask.run(Iocp.java:397)
at
sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Problems in: at
org.apache.tomcat.util.net.Nio2Endpoint$Nio2SocketWrapper$Nio2OperationState.run
(Nio2Endpoint. Java: 1098)
And make sure the problem is since 8.5.76, commit id is
f2cf25b270a84d0daeefc4f215aa2f56e1df99 01
The above problem is in server.xml, <Connector>. Did not appear after the tag's
protocol was deleted or set to Nio.
We do not see a fix for this issue in the latest version 8.5.85.
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