<![CDATA[Failed to write core dump]]>Hello

Now and then production Mango solution is found "crashed"! With this I mean that MANGO Stops once we can get access to Webmin.

Looking to the generated logs I found a common message about Java than says: "Failed to write core dump. Core dumps have been disabled. To enable core dumping, try ulimit -c unlimited before starting Java again"

My question is: Is it or not recommended to issue the specified command?

ulimit -c unlimited

If you does not recommend it what should I try to solve the MANGO crashing issues?

Thanks in advance,
José

]]>https://forum.mango-os.com/topic/3184/failed-to-write-core-dumpRSS for NodeMon, 20 Apr 2026 06:48:14 GMTThu, 04 Jan 2018 12:27:44 GMT60<![CDATA[Reply to Failed to write core dump on Fri, 05 Jan 2018 16:23:08 GMT]]>You need to have Mango (and any other Java program) stopped when you do the update to Java, and then restart Mango with the new Java.

]]>https://forum.mango-os.com/post/16728https://forum.mango-os.com/post/16728Fri, 05 Jan 2018 16:23:08 GMT<![CDATA[Reply to Failed to write core dump on Fri, 05 Jan 2018 11:03:39 GMT]]>Is there a special upgrade process for Java/MANGO that I have to pay attention once this is in a production environment or is that straight forward?

Thanks in advance,
José

]]>https://forum.mango-os.com/post/16726https://forum.mango-os.com/post/16726Fri, 05 Jan 2018 11:03:39 GMT<![CDATA[Reply to Failed to write core dump on Thu, 04 Jan 2018 17:32:48 GMT]]>Your hs_err files contain,

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0xb3f3d7cc, pid=592, tid=1828779104
#

One of the two hs_err files shows it was deep in the JVM when this happened. The first thing I would do in seeking resolution is update Java, as you appear to be on u33 when the latest are u151 and u152

]]>https://forum.mango-os.com/post/16721https://forum.mango-os.com/post/16721Thu, 04 Jan 2018 17:32:48 GMT<![CDATA[Reply to Failed to write core dump on Thu, 04 Jan 2018 16:59:44 GMT]]>The problem to upload it seems

Error
You do not have enough privileges for this action.

I will send to you by email

]]>https://forum.mango-os.com/post/16720https://forum.mango-os.com/post/16720Thu, 04 Jan 2018 16:59:44 GMT<![CDATA[Reply to Failed to write core dump on Thu, 04 Jan 2018 16:56:30 GMT]]>Hmm, doesn't look like the upload worked. You can email them to us, or try the upload again. I find the buttons above the post body work best, and that I need to wait for it to present a blue link in the preview section of the post, which typically takes several seconds after it says (Uploading 100%)

]]>https://forum.mango-os.com/post/16719https://forum.mango-os.com/post/16719Thu, 04 Jan 2018 16:56:30 GMT<![CDATA[Reply to Failed to write core dump on Thu, 04 Jan 2018 16:54:09 GMT]]>@phildunlap

Yes Phil I do have hs_err files.
I upload the last ones hope it may help [1_1515084790078_hs_err_pid592.log](Uploading 100%) [0_1515084790077_hs_err_pid568.log](Uploading 100%)

Thanks,
José

]]>https://forum.mango-os.com/post/16718https://forum.mango-os.com/post/16718Thu, 04 Jan 2018 16:54:09 GMT<![CDATA[Reply to Failed to write core dump on Thu, 04 Jan 2018 17:32:14 GMT]]>Hi José,

I do not believe that is the cause. If it were, you would see messages in your ma.log files about not having enough available file descriptors. (Probably, IOException: Too many open files)

It sounds like Java is having an error. Do you have any hs_err files in your Mango/ directory? If so, they should have information as to the cause. If not, what is occurring in your ma.log when it ends?

]]>https://forum.mango-os.com/post/16717https://forum.mango-os.com/post/16717Thu, 04 Jan 2018 17:32:14 GMT