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Benimaur,
On 1/2/14, 5:20 AM, Benimaur Gao wrote:
> I found my tomcat refusing to work this morning. I tried jstack to
> get some info, and then I found a lot of thread call stack like:
>
> "http-8082-154" daemon prio=10 tid=0x00007f711c21f800 nid=0x5b0a
> waiting on
>> condition [0x00007f70dc887000] java.lang.Thread.State:
>> TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native
>> Method) at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:132)
Your
>>
context (aka web application) is reloading. That's the only time
StandardContextValve calls Thread.sleep() -- and only in Tomcat 6.
Tomcat 7 and 8 don't do this.
The request coming from the remote client (indicated by the use of the
"http-xxxx-yyyy" thread name) is waiting on the webapp to complete its
reload. You'll see one of these threads in this state for each request
you got since the webapp started reloading.
> It seems all of the 200 JIoEndpoint$Worker threads had been
> occupied. and I guess that's why tomcat refuse to serve any
> incoming request.
Sounds about right.
> After I got a copy of the source of my tomcat. I found $ grep -B3
> -A8 context.getPaused\(\)
> /home/benimaur/workspace/eclipse/tomcat/src/org/apache/catalina/core/StandardContextValve.java
>
>
>> 126- 127- // Wait if we are reloading 128- boolean
>> reloaded = false; 129: while (context.getPaused()) { 130-
>> reloaded = true; 131- try { 132-
>> Thread.sleep(1000); 133- } catch (InterruptedException
>> e) { 134- ; 135- } 136- } 137-
>>
>
> It seems context had been set to reload state at some time, but I
> can't figure out under what circumstance would put tomcat into
> such state. does any one here could give me more clue? thanks in
> advance.
Do you use the manager app? What are your <Engine> settings for things
like reloading, etc. from server.xml?
- -chris
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