--- Comment #3 from Rainer Jung <> ---
Observed a hanging test for NIO2 during 8.0.52 unit test runs on Solaris 10.
Hangs seem to happen sporadically, observed for .32, .43, .47-.52.

Thread dump for 8.0.52 :

    [junit] "main" prio=3 tid=0x0002a800 nid=0x2 runnable [0xfdf7d000]
    [junit]    java.lang.Thread.State: RUNNABLE
    [junit]     at Method)
    [junit]     at
    [junit]     at
    [junit]     at
    [junit]     at
    [junit]     at
    [junit]     - locked <0xe6d5ab68> (a java.lang.Object)
    [junit]     at
    [junit]     at
    [junit]     - locked <0xe6fa2b00> (a
    [junit]     at sun.nio.cs.StreamDecoder.readBytes(
    [junit]     at sun.nio.cs.StreamDecoder.implRead(
    [junit]     at
    [junit]     - locked <0xe6fab7b8> (a
    [junit]     at sun.nio.cs.StreamDecoder.read0(
    [junit]     - locked <0xe6fab7b8> (a
    [junit]     at
    [junit]     at
    [junit]     at
    [junit]     at

>From the access log one request plus one reneg seems to have worked: - - [07/May/2018:16:17:45 +0200] "GET /tester HTTP/1.1" 200 2
http-nio2- 9 - - [07/May/2018:16:17:45 +0200] "GET /tester HTTP/1.1" 200 2
http-nio2- 7

but then it hanged until killing it (waited for more than 30 minutes before
observing and killing).

Log lines before hang do not give additional insight:

    [junit] 07-May-2018 16:17:45.528 INFO [main]
org.apache.catalina.startup.LoggingBaseTest.setUp Starting test case
    [junit] 07-May-2018 16:17:45.545 INFO [main]
org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler
    [junit] 07-May-2018 16:17:45.626 INFO [main]
org.apache.catalina.core.StandardService.startInternal Starting service Tomcat
    [junit] 07-May-2018 16:17:45.627 INFO [main]
org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine:
Apache Tomcat/8.0.52
    [junit] 07-May-2018 16:17:45.679 INFO [main]
org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler



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