Thread Stuck In CONNECTION.CLOSE() And Database Session In "SQL*Net More Data From Client" After Inserting CLOB Objects With JDBC
(Doc ID 2805410.1)
Last updated on OCTOBER 26, 2021
Applies to:JDBC - Version 22.214.171.124.0 to 126.96.36.199.0 [Release 12c to 20c]
Information in this document applies to any platform.
While running within the Oracle Commerce Cloud service (which is itself running in OCI on WebLogic 188.8.131.52.0), it was encountered an issue where a specific SQL update did not complete and caused a STUCK thread.
The transaction was holding certain Database locks that prevented other updates from occurring which eventually caused a site outage.
The list of blocking sessions showed the particular SQL session with an EVENT of "SQL*Net more data from client".
The main issue is that the Java side of things appear to be waiting on the database, while the database was waiting on the Java side.
The Stuck thread is as follows:
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