Server Lock Manager

[deepa...@gmail.com]

Our server lock manager is showing locked items while viewing 'Display
Lock Table' through dyn/admin. As per my understanding SLM doesn't
perist lock info to DB. Is there a way to release/kill the lock
without restarting the server?

Thanks,
Deepa

[Shailendra Pateria]

Deepa, can you please elaborate a bit more, Lock manager indeed manage locks on the db items, some for "read" and some for "write" and it controls which thread was first and which thread gets the next lock on a particular db item.

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Best Regards,
Shailendra Pateria

[deepa...@gmail.com]

There was a scenario where the search config repository of two
environments were pointing to same DB. The lock issue came up when we
triggered search indexing from both environments simultaneously. A
snippet from thread dump is as follows:

Thread 24467: (state = BLOCKED)
- java.lang.Object.wait(long) @bci=0 (Interpreted frame)
-
atg.service.lockmanager.ClientLockEntry.acquireWriteLock(atg.service.lockmanager.ClientLockManager,
java.lang.Object, java.lang.Object, long, boolean) @bci=264, line=399
(Interpreted frame)
-
atg.service.lockmanager.ClientLockManager.acquireWriteLock(java.io.Serializable,
java.lang.Object) @bci=118, line=1137 (Interpreted frame)
-
atg.repository.search.indexing.ConfigStatePersister.acquireLock(java.lang.Thread,
boolean) @bci=11, line=1399 (Interpreted frame)
- atg.repository.search.indexing.ConfigStatePersister
$IndexingReadLockedTransactionAction.doWithTransaction

Whats the best way to release the locks ?

[Shailendra Pateria]

Do you also have a back up lock server? Did you try restarting the ServerLockManager component?

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[deepa...@gmail.com]

Yes we do have a secondary SLM. So going for a restart of primary SLM.

Thanks for your help.

-Deepa