Wildfly 10.1 stops responding with no error

[amandahf]

We have a reoccurring issue, where requests to wildfly will suddenly stop returning. This issue seems to happen randomly. Sometimes it can take weeks, sometimes days.

The log continues as if nothing is wrong, there are no error messages, however no one can get to our applications until we restart wildfly. When this issue occurs, you can see the background processes of the application are running and writing to the log even though requests to 8080 are all timing out. 

Startup parameters

-Xms4096m -Xmx4096m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m

Any suggests on how to debug this would be appreciated.

[jamezp]

Have you taken any thread dumps to see where it may be blocking?

--

James R. Perkins

[jayshreedatta]

To debug performance issue like slowness/hung it's best practice to take 5-6 thread dumps in the interval of 15-20 seconds, so that you can see each thread progress over the time and if any thread is BLOCKED or long running(not changing it's state) in most of the thread dumps continuously then those threads could be causing the issue.