Tomcat unresponsive

[Christoph Empl]

Hello,

i’m facing a problem that my tomcat seems to become unresponsive if it’s under 
a certain load.

Most threads in threaddumps look like this:


"https-jsse-nio-21030-exec-133" #13306 daemon prio=5 os_prio=0 cpu=17099.37ms 
elapsed=897.51s tid=0x00007f6270063b00 nid=0x1e5c38 in Object.wait()  
[0x00007f6109df4000]

   java.lang.Thread.State: TIMED_WAITING (on object monitor)

        at java.lang.Object.wait(java.base@17.0.3/Native Method)

        - waiting on <no object reference 
available><monitor://%3cno%20object%20reference%20available%3e>

        at 
org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.fillReadBuffer(NioEndpoint.java:1325)

        - locked <0x000000050f48a720><monitor://%3c0x000000050f48a720%3e> (a 
java.util.concurrent.Semaphore)

        at 
org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.read(NioEndpoint.java:1226)

        at 
org.apache.coyote.http11.Http11InputBuffer.fill(Http11InputBuffer.java:805)

        at 
org.apache.coyote.http11.Http11InputBuffer.access$400(Http11InputBuffer.java:42)

        at 
org.apache.coyote.http11.Http11InputBuffer$SocketInputBuffer.doRead(Http11InputBuffer.java:1185)

        at 
org.apache.coyote.http11.filters.IdentityInputFilter.end(IdentityInputFilter.java:151)

        at 
org.apache.coyote.http11.Http11InputBuffer.endRequest(Http11InputBuffer.java:655)

        at 
org.apache.coyote.http11.Http11Processor.endRequest(Http11Processor.java:1192)

        at 
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:439)

        at 
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)

        at 
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)

        at 
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)

        at 
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

        - locked <0x000000050f48a730><monitor://%3c0x000000050f48a730%3e> (a 
org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper)

        at 
org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)

        at 
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)

        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

        at java.lang.Thread.run(java.base@17.0.3/Thread.java:833)


I’m suspecting a slow network. Does anybody have another idea?


Thanks, Christoph