https://bz.apache.org/bugzilla/show_bug.cgi?id=63993

            Bug ID: 63993
           Summary: Fatal error EXCEPTION_ACCESS_VIOLATION are thrown
                    while the load test scenario includes multiple
                    concurrent connections
           Product: Tomcat 7
           Version: 7.0.94
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
          Assignee: dev@tomcat.apache.org
          Reporter: michael.misha...@nice.com
  Target Milestone: ---

Created attachment 36911
  --> https://bz.apache.org/bugzilla/attachment.cgi?id=36911&action=edit
generated thread dump while due EXCEPTION_ACCESS_VIOLATION error

Fatal error EXCEPTION_ACCESS_VIOLATION are thrown while the load test scenario
include 1K concurrent connections 

While running performance test of our application we see random spikes of CPU
utilisation and increases on Open AM active sessions without any increase in
load. 
After certain time Tomcat crashes with EXCEPTION_ACCESS_VIOLATION exception.

We tested the same scenario with different connectors (APR (native) and BIO) on
Windows Server 2012R2 and on Windows Server 2016 and also filtered out all
application specific scenarios to isolate the root course of the issue. 

During our investigation we also found two issues reported previously that may
be closely related to this one as well, however it seems that version we are
using already have native library that contains this fix.

https://bz.apache.org/bugzilla/show_bug.cgi?id=56313
https://bz.apache.org/bugzilla/show_bug.cgi?id=57653



Attached is the thread dump that includes EXCEPTION_ACCESS_VIOLATION error.

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