URGENT: JNDI Reference being lost
Hi,
We have 2 Weblogic 5.1 Servers in a clustered mode. I have an unclusterable
object bound in the JNDI tree just for reference purposes. This object
implements Serializable, but it has a thread reference, and hence it cannot
be clustered. This object is bound from both servers with different names
lets call them OBJ_A and OBJ_B. Client Threads running on Server A can only
lookup OBJ_A and Client Threads running on Server B can only lookup OBJ_B
although due to the fact that the JNDI tree is clustered, the reference of
OBJ_A and OBJ_B is available on both Servers A and B. Let me make it more
clear by saying that the reference of OBJ_A on Server B is useless to the
Client Threads running on that Server (B) and also the reference of OBJ_B on
Server A is useless to the Client Threads running on that Server (A)
At startup everything is fine. However, I am noticing that after a while (a
while being 1-2 days or less) the JNDI reference of OBJ_A on Server A
disappears although I can see that the Thread that it represents is alive
and running, it keeps outputting its heartbeat. The funny thing is that, the
reference of OBJ_B on Server A still remains, and also the references of
OBJ_A and OBJ_B on Server B remain in the JNDI tree too.
Has anyone seen such a problem or a similar problem where the cluster-wide
JNDI tree loses its references and does not broadcast it to other servers?
Coz if the object was taken out of the JNDI tree, it should have gone from
the other server as well.
I have several such objects listed in the JNDI tree, and their references
from Server A just disappear whereas they are still present in the JNDI tree
on Server B where they are really useless.
Please let me know if you have any insights.
Thanks
Abhijit
Thanks Cameron, I am afraid I dont know if this will help. Basically I dont
care if JNDI replicates the entries or not.. but why should it forget a
reference when the object has not unbound itself, neither has the Thread it
runs on died. The object has also not been garbage collected.
So not sure yet.. but will try the option you mentioned.
Does anybody know if JNDI will release references of objects after certain
periods of inactivity? i.e. if no client 'looks up' an object for a certain
time, its binding will be released from the JNDI tree?
Thanks for your help.
Abhijit
"Cameron Purdy" <[email protected]> wrote in message
news:[email protected]...
One thing I would suggest is using WL's option to not replicate theentries
that you are describing. I can't remember the name of the option off-hand,
but it's something like "don't replicate". Check the WL JNDIdocumentation.
>
Peace,
Cameron Purdy
Tangosol Inc.
Tangosol Coherence: Clustered Coherent Cache for J2EE
Information at http://www.tangosol.com/
"Abhijit Adhyapak" <[email protected]> wrote in message
news:[email protected]...
Hi,
We have 2 Weblogic 5.1 Servers in a clustered mode. I have anunclusterable
object bound in the JNDI tree just for reference purposes. This object
implements Serializable, but it has a thread reference, and hence itcannot
be clustered. This object is bound from both servers with different
names
lets call them OBJ_A and OBJ_B. Client Threads running on Server A canonly
lookup OBJ_A and Client Threads running on Server B can only lookup
OBJ_B
although due to the fact that the JNDI tree is clustered, the referenceof
OBJ_A and OBJ_B is available on both Servers A and B. Let me make itmore
clear by saying that the reference of OBJ_A on Server B is useless tothe
Client Threads running on that Server (B) and also the reference ofOBJ_B
on
Server A is useless to the Client Threads running on that Server (A)
At startup everything is fine. However, I am noticing that after a while(a
while being 1-2 days or less) the JNDI reference of OBJ_A on Server A
disappears although I can see that the Thread that it represents is
alive
and running, it keeps outputting its heartbeat. The funny thing is that,the
reference of OBJ_B on Server A still remains, and also the references of
OBJ_A and OBJ_B on Server B remain in the JNDI tree too.
Has anyone seen such a problem or a similar problem where the
cluster-wide
JNDI tree loses its references and does not broadcast it to otherservers?
Coz if the object was taken out of the JNDI tree, it should have gonefrom
the other server as well.
I have several such objects listed in the JNDI tree, and theirreferences
from Server A just disappear whereas they are still present in the JNDItree
on Server B where they are really useless.
Please let me know if you have any insights.
Thanks
Abhijit
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Hello,
I have a problem with JNDI references. I have developed an enterprise application that includes 6 EJBs and a client application. With the deploytool I make an .ear file including the application and EJBs. I include EJBs references too on properties. When I deploy my application on the server the client application runs very well but if I stop the server and start it other time, the client application says that cannot find the JNDI objects.
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