Coherence Write-behind Causing Oracle Sessions To Block On Insert, How to Avoid? (Doc ID 2323576.1)

Last updated on DECEMBER 20, 2023

Applies to:

Symptoms

During a rolling restart of the Coherence Cluster customer sees instances where several storage enabled jvms’ write-behind threads attempt to write the same data to Oracle DB, causing lock contention and block the application from writing to Oracle DB. This eventually leads to application failure. User can identify this by multiple instances attempting to insert the same data (sql_id). Application requests supposed to be happening the updates with no contention. 

Cause

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