On 05/10/2020 10:56, Arshiya Shariff wrote: > Hi All, > > Thank you so much Mark . > We tested the jars built from latest 9.0.x with 2000 / 5000 users > (connections) from JMeter , We see a very good improvement with the heap > usage
Good news. As is the fact that the other errors have been cleared up. > But I see this exception printed multiple times , I am not sure why this > occurs : > Exception in thread "http-nio-x.y.z-1234-exec-213" > java.lang.StackOverflowError > at sun.nio.ch.IOUtil.read(IOUtil.java:240) > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:440) > at org.apache.tomcat.util.net.NioChannel.read(NioChannel.java:174) > at > org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper$NioOperationState.run(NioEndpoint.java:1468) > at > org.apache.tomcat.util.net.SocketWrapperBase$VectoredIOCompletionHandler.completed(SocketWrapperBase.java:1100) > at > org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper$NioOperationState.run(NioEndpoint.java:1511) > at > org.apache.tomcat.util.net.SocketWrapperBase$VectoredIOCompletionHandler.completed(SocketWrapperBase.java:1100) > at > org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper$NioOperationState.run(NioEndpoint.java:1511) > at > org.apache.tomcat.util.net.SocketWrapperBase$VectoredIOCompletionHandler.completed(SocketWrapperBase.java:1100) > at > org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper$NioOperationState.run(NioEndpoint.java:1511) That looks like an infinite loop reading an incoming frame. New frames are read using a 9 byte buffer for the header and a 16k buffer for the payload (since Tomcat sets this as the max frame size). The loop is occurring because one of those buffers is simultaneously both full and still has more data to read. That should not be possible and I haven't yet been able to figure out how this is happening. How easy is this to reproduce? How often do you see these errors in your test run? Do you have a reliable test case that reproduces this on a clean Tomcat 9.0.x build? If is, can you share the details? Do you have the other end of that stack trace? I'm interested in how the code enters the loop. Thanks, Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
