Contention Due To Sys.dbms_xa.dist_txn_sync
(Doc ID 1954268.1)
Last updated on NOVEMBER 09, 2018
Applies to:Oracle WebLogic Server - Version 22.214.171.124.0 and later
Information in this document applies to any platform.
WLS is kicking off two XA recovery operations at the same time. ExecuteThread 84 is the one communicating with the database, but at the same time, ExecuteThread 39 is kicked off and is also doing a recovery. However, thread 39 is blocked because it is unable to get a connection from the datasource.
In the thread dumps, we can see the following stack:
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