Question

I encountered strange behavior of an JBoss AS 7 on linux server. When I deploy war with my application, the server doesn’t respond for valid HTTP requests for this app. When I try to GET a valid URL, I can see in logs, that backend functions (e.g. DAO methods) are called, debug logs shows that subsequent tags in my JSF are rendered, I even can see a message Rendering View index.xml, but the response never reaches the client.
When I use a non-existent URL (e.g. index.asd) response is 404 and when I use a wrong page name (e.g. inswxasd.xhtml) the response is 500. Thus it fails only with valid requests.

I tried to connect both remotely (using firefox) and locally (with wget) and I reproduced the problem. The strange thing is that I deploy the war that I already used and then it worked.

EDIT 1:

I’ve just noticed that when I send a request to, the server process takes 200% of CPU. Additionally it happens for only one application with stack: Hibernate, Spring, JSF 2.0, Primefaces.

EDIT 2:

Here is pastie with jstack output (jstack -l -F <PID>). All threads are blocked.

Additionally I noticed (using top and dumping stack of the JBoss process) that the problem is most probably caused by a thread called http--0.0.0.0-8080-1. Any ideas?

Answer 1

Thanks for help. I reverted the database to previous state, and it started to work. Apparently there was a problem in the data that caused this infinite loop. Now we need to find it, but as it is reproducible, I’ll manage.