Contention Due To Sys.dbms_xa.dist_txn_sync
Last updated on NOVEMBER 05, 2016
Applies to:Oracle WebLogic Server - Version 18.104.22.168.0 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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