If you are using any OCI Java SDK version(s) >= 3.50.1 and <= 3.65.1, then you might be affected by a potential deadlock issue. We recommend you to update to version 3.66.0 or later. If you are not using any of the affected OCI Java SDK versions, you can ignore this issue.

Description
When using OCI Java SDK version(s) >= 3.50.1 and <= 3.65.1, you might a run into a deadlock scenario with the method com.oracle.bmc.http.client.pki.Utf8.of. The method Utf8.of off-loads its read to CompletableFuture.runAsync() on the global ForkJoinPool.commonPool and immediately calls .join(). In parallel workloads, when this method is invoked from multiple common-pool threads, the very threads needed to run the background read are all blocked in join(). The future’s task never executes, starving the pool and causing a hard deadlock. This issue has been fixed in version 3.66.0.

Affected Versions

• 3.50.1
• 3.50.2
• 3.51.0
• 3.52.0
• 3.52.1
• 3.53.0
• 3.53.1
• 3.54.0
• 3.55.0
• 3.55.1
• 3.55.2
• 3.55.3
• 3.56.0
• 3.57.0
• 3.57.1
• 3.57.2
• 3.58.0
• 3.59.0
• 3.60.0
• 3.61.0
• 3.62.1
• 3.63.0
• 3.63.1
• 3.63.2
• 3.63.3
• 3.64.0
• 3.65.0
• 3.65.1

Actions
Update the OCI Java SDK version to 3.66.0 or later.