> -----Original Message-----
> From: Mark Thomas <ma...@apache.org>
> Sent: Sunday, November 1, 2020 11:50 AM
> To: users@tomcat.apache.org
> Subject: Re: Weirdest Tomcat Behavior Ever?
>
> On 01/11/2020 16:25, Mark Thomas wrote:
> > <snip/>
> >
> > Keeping the previous logs for reference:
> >
> >>> Source  Time             Activity
> >>> ====================================================
> >>> pcap    15:14:25.375451  SYN proxy to Tomcat
> >>> pcap    15:14:25.375493  SYN, ACK Tomcat to proxy
> >>> pcap    15:14:25.375839  ACK proxy to Tomcat
> >>> pcap    15:14:25.375892  GET request proxy to Tomcat
> >>> pcap    15:14:25.375911  ACK Tomcat to proxy
> >>> debug   15:14:25.376     o.a.c.http11.InternalOutputBuffer.init
> >>> pcap    15:14:25.376777  FIN Tomcat to proxy
> >>> pcap    15:14:25.377036  FIN, ACK proxy to Tomcat
> >>> pcap    15:14:25.377048  ACK Tomcat proxy
> >>> debug   15:14:25.383     o.a.c.http11.InternalOutputBuffer.commit
> >>> debug   15:14:25.383     o.a.c.http11.InternalOutputBuffer$1.doWrite
> >>> debug   15:14:25.383     o.a.c.http11.InternalOutputBuffer$1.nextRequest
> >>> debug   15:14:25.383     o.a.c.http11.InternalOutputBuffer$1.recycle
> >>>
> >>> Tomcat writes the request body to the buffer but when Tomcat tries
> >>> to flush those bytes out to the network it finds that the socket has
> >>> been closed. That normally indicates that the client has dropped the
> >>> connection. This is sufficiently common that Tomcat swallows the
> >>> exception. However, we know (from the pcap file) that the client did
> >>> not drop the connection, Tomcat did.
> >
> > The next round of logging added a little more detail for the
> > InternalOutputBuffer and wrapped the Socket to see when close() was
> called.
> >
> > The results from the next round of logging are:
> >
> > Source  Time             Activity
> > ====================================================
> > pcap    13:31:26.344453  SYN proxy to Tomcat
> > pcap    13:31:26.344481  SYN, ACK Tomcat to proxy
> > debug   13:31:26.345     DebugSocket object created
> > debug   13:31:26.345     o.a.c.http11.InternalOutputBuffer.init
> > pcap    13:31:26.345138  ACK proxy to Tomcat
> > pcap    13:31:26.345174  GET request proxy to Tomcat
> > pcap    13:31:26.345194  ACK Tomcat to proxy
> > pcap    13:31:26.395281  FIN, ACK Tomcat to proxy
> > pcap    13:31:26.395725  ACK proxy to Tomcat
> > pcap    13:31:26.395741  FIN, ACK proxy to Tomcat
> > pcap    13:31:26.395754  ACK Tomcat to proxy
> > debug   13:31:26.403     o.a.c.http11.InternalOutputBuffer.commit
> > debug   13:31:26.403     o.a.c.http11.InternalOutputBuffer$1.doWrite
> > debug   13:31:26.404     o.a.c.http11.InternalOutputBuffer$1.nextRequest
> > debug   13:31:26.404     o.a.c.http11.InternalOutputBuffer$1.recycle
> > debug   13:31:26.404     DebugSocket.close called
> >
> > This shows that the socket is closed long before Tomcat tries to write
> > to it (that would be after the doWrite but before nextRequest) or
> > Tomcat explicitly closes the socket.
> >
> > This also shows that neither Tomcat nor the application are directly
> > calling close() on the socket to trigger the close shown by pcap.
> >
> > I continue to come up with theories as to what might be happening but
> > they all seem unlikely.
> >
> > This is the BIO connector so the only time the socket should change
> > state is during a method call. While it might seem a little over the
> > top I think the next step is to log every single method call to
> > DebugSocket along with any exception generated. We need to try and
> > correlate the premature socket closure with something in the JVM. If
> > there is no correlation to find then we really are into the realm of
> > very strange JVM  and/or OS bugs.
> >
> > I'll start work on v3 of the debug patch.
>
> http://home.apache.org/~markt/dev/v7.0.72-custom-patch-v3/
>
> I opted to wrap both the InputStream and OutputStream associated with the
> socket and log every method call and every exception thrown. I opted not to
> log parameters with the exception of socket timeout since that might be
> relevant.
>
> The debug logs will be noticeably more verbose that last time. Feel free to
> adjust the number/size of debug log files as suits your environment.
>
> Mark
>

I applied the V3 patch and confirmed that content is being written to 
debug0.log, but right away I noticed an error recurring repeatedly. See below.

<snip>

02-Nov-2020 06:17:12.992 FINE [http-bio-3016-exec-1] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close bind
02-Nov-2020 06:17:15.634 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.<init> DebugSocket 
[783035752], inner Socket [1397828144] for client port [52730]
02-Nov-2020 06:17:15.634 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoLinger [783035752]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [783035752], 
timeout [20000]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setTcpNoDelay [783035752]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInputStream [783035752]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.<init> DebugInputStream 
[516548719], inner InputStream [1456423668]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getOutputStream DebugSocket 
[783035752], inner Socket [1397828144] has OutputStream [1891375218]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.<init> 
DebugOutputStream [969837058], inner OutputStream [1891375218]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getPort [783035752]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.init Creating outputStream for 
InternalOutputBuffer [1266622558], client port is [52730], outputStream is 
[969837058]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [783035752], 
timeout [20000]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.read [516548719]
02-Nov-2020 06:17:15.635 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [783035752], 
timeout [20000]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.commit Writing headers of length 
[367] for InternalOutputBuffer [1266622558] to socketBuffer [1099385646], 
underlying byte[] is [431522739]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite 
Writing body of length [313] from ByteChunk [1211819308] with underlying byte[] 
[1517838844] for InternalOutputBuffer [1266622558] and OutputStreamOutputBuffer 
[1169741633] to socketBuffer [1099385646] with underlying byte[] [431522739]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.write [969837058]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes Writing body of 
length [680] from byte[] [431522739] for InternalOutputBuffer [1266622558] to 
outputStream [969837058]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1266622558]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInetAddress [783035752]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1266622558]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1266622558]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1266622558]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.coyote.http11.InternalOutputBuffer.recycle Recycling 
InternalOutputBuffer [1266622558]
02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close close [783035752], 
inner Socket [1397828144]
 java.lang.Exception
        at 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close(JIoEndpoint.java:1085)
        at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:333)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

02-Nov-2020 06:17:15.640 FINE [http-bio-3016-exec-3] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close bind
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.<init> DebugSocket 
[1974876552], inner Socket [240336817] for client port [52820]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoLinger [1974876552]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1974876552], 
timeout [20000]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setTcpNoDelay [1974876552]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInputStream [1974876552]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.<init> DebugInputStream 
[1514665050], inner InputStream [1640150621]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getOutputStream DebugSocket 
[1974876552], inner Socket [240336817] has OutputStream [1369457081]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.<init> 
DebugOutputStream [20035960], inner OutputStream [1369457081]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getPort [1974876552]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.init Creating outputStream for 
InternalOutputBuffer [1064649574], client port is [52820], outputStream is 
[20035960]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1974876552], 
timeout [20000]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.read [1514665050]
02-Nov-2020 06:17:15.994 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1974876552], 
timeout [20000]
02-Nov-2020 06:17:15.998 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.commit Writing headers of length 
[367] for InternalOutputBuffer [1064649574] to socketBuffer [898443286], 
underlying byte[] is [1888460995]
02-Nov-2020 06:17:15.998 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite 
Writing body of length [313] from ByteChunk [1055384114] with underlying byte[] 
[942102746] for InternalOutputBuffer [1064649574] and OutputStreamOutputBuffer 
[833792760] to socketBuffer [898443286] with underlying byte[] [1888460995]
02-Nov-2020 06:17:15.998 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.write [20035960]
02-Nov-2020 06:17:15.998 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes Writing body of 
length [680] from byte[] [1888460995] for InternalOutputBuffer [1064649574] to 
outputStream [20035960]
02-Nov-2020 06:17:15.998 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1064649574]
02-Nov-2020 06:17:15.998 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInetAddress [1974876552]
02-Nov-2020 06:17:15.999 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1064649574]
02-Nov-2020 06:17:15.999 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1064649574]
02-Nov-2020 06:17:15.999 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1064649574]
02-Nov-2020 06:17:15.999 FINE [http-bio-3016-exec-5] 
org.apache.coyote.http11.InternalOutputBuffer.recycle Recycling 
InternalOutputBuffer [1064649574]
02-Nov-2020 06:17:15.999 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close close [1974876552], 
inner Socket [240336817]
 java.lang.Exception
        at 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close(JIoEndpoint.java:1085)
        at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:333)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

02-Nov-2020 06:17:15.999 FINE [http-bio-3016-exec-5] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close bind
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.<init> DebugSocket 
[1096520830], inner Socket [453060303] for client port [53144]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoLinger [1096520830]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1096520830], 
timeout [20000]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setTcpNoDelay [1096520830]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInputStream [1096520830]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.<init> DebugInputStream 
[390721225], inner InputStream [514490958]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getOutputStream DebugSocket 
[1096520830], inner Socket [453060303] has OutputStream [438032113]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.<init> 
DebugOutputStream [907143655], inner OutputStream [438032113]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getPort [1096520830]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.init Creating outputStream for 
InternalOutputBuffer [1792035857], client port is [53144], outputStream is 
[907143655]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1096520830], 
timeout [20000]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.read [390721225]
02-Nov-2020 06:17:19.000 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1096520830], 
timeout [20000]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.commit Writing headers of length 
[367] for InternalOutputBuffer [1792035857] to socketBuffer [1613244257], 
underlying byte[] is [1704854550]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite 
Writing body of length [313] from ByteChunk [790671316] with underlying byte[] 
[530352728] for InternalOutputBuffer [1792035857] and OutputStreamOutputBuffer 
[1679273787] to socketBuffer [1613244257] with underlying byte[] [1704854550]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.write [907143655]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes Writing body of 
length [680] from byte[] [1704854550] for InternalOutputBuffer [1792035857] to 
outputStream [907143655]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1792035857]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInetAddress [1096520830]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1792035857]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1792035857]
02-Nov-2020 06:17:19.004 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1792035857]
02-Nov-2020 06:17:19.005 FINE [http-bio-3016-exec-7] 
org.apache.coyote.http11.InternalOutputBuffer.recycle Recycling 
InternalOutputBuffer [1792035857]
02-Nov-2020 06:17:19.005 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close close [1096520830], 
inner Socket [453060303]
 java.lang.Exception
        at 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close(JIoEndpoint.java:1085)
        at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:333)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

02-Nov-2020 06:17:19.005 FINE [http-bio-3016-exec-7] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close bind
02-Nov-2020 06:17:20.642 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.<init> DebugSocket 
[1606366814], inner Socket [1216750767] for client port [53346]
02-Nov-2020 06:17:20.642 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoLinger [1606366814]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1606366814], 
timeout [20000]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setTcpNoDelay [1606366814]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInputStream [1606366814]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.<init> DebugInputStream 
[1976078131], inner InputStream [1089573615]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getOutputStream DebugSocket 
[1606366814], inner Socket [1216750767] has OutputStream [1857501447]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.<init> 
DebugOutputStream [387013203], inner OutputStream [1857501447]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getPort [1606366814]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.init Creating outputStream for 
InternalOutputBuffer [333394221], client port is [53346], outputStream is 
[387013203]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1606366814], 
timeout [20000]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.read [1976078131]
02-Nov-2020 06:17:20.645 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1606366814], 
timeout [20000]
02-Nov-2020 06:17:20.649 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.commit Writing headers of length 
[367] for InternalOutputBuffer [333394221] to socketBuffer [1816828035], 
underlying byte[] is [1863475553]
02-Nov-2020 06:17:20.649 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite 
Writing body of length [313] from ByteChunk [167150481] with underlying byte[] 
[1652911976] for InternalOutputBuffer [333394221] and OutputStreamOutputBuffer 
[524834708] to socketBuffer [1816828035] with underlying byte[] [1863475553]
02-Nov-2020 06:17:20.649 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.write [387013203]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes Writing body of 
length [680] from byte[] [1863475553] for InternalOutputBuffer [333394221] to 
outputStream [387013203]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[333394221]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInetAddress [1606366814]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[333394221]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[333394221]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[333394221]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.coyote.http11.InternalOutputBuffer.recycle Recycling 
InternalOutputBuffer [333394221]
02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close close [1606366814], 
inner Socket [1216750767]
 java.lang.Exception
        at 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close(JIoEndpoint.java:1085)
        at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:333)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

02-Nov-2020 06:17:20.650 FINE [http-bio-3016-exec-10] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close bind
02-Nov-2020 06:17:22.006 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.<init> DebugSocket 
[1432592805], inner Socket [1204212376] for client port [53578]
02-Nov-2020 06:17:22.006 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoLinger [1432592805]
02-Nov-2020 06:17:22.006 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1432592805], 
timeout [20000]
02-Nov-2020 06:17:22.006 FINE [http-bio-3016-Acceptor-0] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setTcpNoDelay [1432592805]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInputStream [1432592805]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.<init> DebugInputStream 
[1424019493], inner InputStream [1827092398]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getOutputStream DebugSocket 
[1432592805], inner Socket [1204212376] has OutputStream [1335150781]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.<init> 
DebugOutputStream [1404089830], inner OutputStream [1335150781]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getPort [1432592805]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.init Creating outputStream for 
InternalOutputBuffer [1806171306], client port is [53578], outputStream is 
[1404089830]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1432592805], 
timeout [19999]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugInputStream.read [1424019493]
02-Nov-2020 06:17:22.007 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.setSoTimeout [1432592805], 
timeout [20000]
02-Nov-2020 06:17:22.011 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.commit Writing headers of length 
[367] for InternalOutputBuffer [1806171306] to socketBuffer [1915165875], 
underlying byte[] is [1564626224]
02-Nov-2020 06:17:22.011 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite 
Writing body of length [313] from ByteChunk [1650015667] with underlying byte[] 
[1271712161] for InternalOutputBuffer [1806171306] and OutputStreamOutputBuffer 
[1222724924] to socketBuffer [1915165875] with underlying byte[] [1564626224]
02-Nov-2020 06:17:22.011 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugOutputStream.write [1404089830]
02-Nov-2020 06:17:22.011 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes Writing body of 
length [680] from byte[] [1564626224] for InternalOutputBuffer [1806171306] to 
outputStream [1404089830]
02-Nov-2020 06:17:22.011 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1806171306]
02-Nov-2020 06:17:22.011 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.getInetAddress [1432592805]
02-Nov-2020 06:17:22.012 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.endRequest InternalOutputBuffer 
[1806171306]
02-Nov-2020 06:17:22.012 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1806171306]
02-Nov-2020 06:17:22.012 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.nextRequest InternalOutputBuffer 
[1806171306]
02-Nov-2020 06:17:22.012 FINE [http-bio-3016-exec-9] 
org.apache.coyote.http11.InternalOutputBuffer.recycle Recycling 
InternalOutputBuffer [1806171306]
02-Nov-2020 06:17:22.012 FINE [http-bio-3016-exec-9] 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close close [1432592805], 
inner Socket [1204212376]
 java.lang.Exception
        at 
org.apache.tomcat.util.net.JIoEndpoint$DebugSocket.close(JIoEndpoint.java:1085)
        at 
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:333)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

</snip>

--Eric
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