[jacorb-developer] Running out of Threads

[Nick Cross]

Firstly, can you retest using the current version (3.4).

Secondly, are you calling _release once you have finished with the 
client object?

Regards

Nick


On 31/01/14 12:54, Wagner, Marcus (Marcus) wrote:
> Hi,
>
> I have a CORBA Server using JacORB (actually 2.3.1). In general, the
> server offers some CORBA Objects. Clients work with them and while
> doing that, they will register CORBA Objects as callback at the
> server. This is used to push events from the server to clients. So in
> the end the server is from a CORBA point of view a server and a
> client. But In the further text when I write server, I mean the
> server process and when I write client I mean the client
> application.
>
> Now the problem is, that after a few weeks in operation, there is a
> Thread Pool running out of idle Threads. I get the error "no idle
> threads but maximum number of threads reached". As the amount of
> Threads mentioned is 1000. It needs to be whether the server receptor
> threads or the client receptor threads (maybe?).
>
> When I make a Thread dump of the system, then there are a lot of
> "ClientMessageReceptor" Threads. (At the dump time about 850). So I
> assume, that the affected ThreadPool is the client receptor thread
> pool. Is this assumption any good?
>
> Next I am wondering why those threads does not become idle. A Stack
> trace of one of those WAITING Threads looks like: Thread#900433
> "ClientMessageReceptor728" WAITING on java.lang.Object at 7938f
> blocked/waiting: 94/2 java.lang.Object.wait(Native Method)
> java.lang.Object.wait(Object.java:485)
> org.jacorb.orb.giop.GIOPConnection.waitUntilConnected(GIOPConnection.java:285)
>
>
org.jacorb.orb.giop.GIOPConnection.getMessage(GIOPConnection.java:325)
> org.jacorb.orb.giop.GIOPConnection.receiveMessages(GIOPConnection.java:475)
>
>
org.jacorb.orb.giop.MessageReceptor.doWork(MessageReceptor.java:71)
> org.jacorb.util.threadpool.ConsumerTie.run(ConsumerTie.java:61)
> java.lang.Thread.run(Thread.java:662)
>
> My questions here are: The client receptor threads, when are they
> required/used. Is it when a Client calls a method on the server? What
> connection is the Thread actually waiting for in
> "org.jacorb.orb.giop.GIOPConnection.waitUntilConnected(GIOPConnection.java:285)"?
>
>
Does this thread wait for an incoming CORBA method call? Or does the 
thread wait for an answer to a remote call he has issued to the client?
>
>
> Thanks in advance
>
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