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Satish,

On 1/26/17 2:28 PM, Satish Chhatpar 02 wrote:
> we are using Apache Tomcat/7.0.39 for our java application.

I highly recommend an upgrade for both Tomcat and Java. There are
published vulnerabilities for both product versions you are using.

> There are 4 tomcat instances using same tomcat version and java 
> version. yesterday all 4 tomcats crashed with below error in 
> hs_err_pid log file.

All on the same hardware? Or separate machines?

> This log file was created for all 4 tomcats.
> 
> Its very peculiar behaviour that all 4 crashed around same time.

If they are in a cluster, one going down could cause the load on the
others to go up, increasing the chances of a problem.

> Any information can help us to mitigate this incident.
> 
> Apache Tomcat/7.0.39

Unless this is a package-managed version of Tomcat with an
unfortunately inaccurate version number, that version of Tomcat is
nearly 3 years old. The current version in the 7.0.x line is 7.0.75
(released yesterday).

> java version "1.7.0_21" Java(TM) SE Runtime Environment (build
> 1.7.0_21-b11) Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01,
> mixed mode)

That version of Java is also nearly 3 years old. Latest 1.7 build is
1.7.0_80 release nearly 3 years ago. Note that Java 7 is no longer
supported unless you have a long-term support contract with Oracle, in
which case the latest version is 1.7.0_131, released earlier this month.

> OS used
> 
> 
> Red Hat Enterprise Linux Server release 6.3 (Santiago)

Ouch! 5 years old!

> # # A fatal error has been detected by the Java Runtime
> Environment: # #  SIGSEGV (0xb) at pc=0x00007fed24ecfe9e,
> pid=21352, tid=140656275650304 # # JRE version: 7.0_21-b11 # Java
> VM: Java HotSpot(TM) 64-Bit Server VM (23.21-b01 mixed mode
> linux-amd64 compressed oops) # Problematic frame: # J
> org.apache.http.impl.cookie.BestMatchSpec.formatCookies(Ljava/util/Lis
t;)Ljava/util/List;
>
> 
#
> # Failed to write core dump. Core dumps have been disabled. To
> enable core dumping, try "ulimit -c unlimited" before starting Java
> again # # If you would like to submit a bug report, please visit: #
> http://bugreport.sun.com/bugreport/crash.jsp #

This is either a JVM bug is a hardware error. Given that the OS if 5
years old, I'm guessing the hardware is at least that old. I'd expect
5-year old hardware to be fairly trustworthy, but it may not have been
properly-tested before going into production.

If it's all on a single piece of hardware (all 4 Tomcats), I'd blame
the hardware and look for a speedy replacement (properly-tested this
time). If it was on different machines, I'd suspect a JVM bug.

- -chris
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