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ENS Heap Corruption Under Load (Doc ID 2980179.1)

Last updated on OCTOBER 11, 2023

Applies to:

Oracle Communications Messaging Server - Version 8.1.0 and later
Information in this document applies to any platform.


Using: Oracle Communications Messaging Server 64bit (built Jan 17 2022)

Core dumps from several processes occurred and were noted: imapd, ims_master, tcp_lmtp_server, and imexpire.

A pstack showed that this issue may be related to a heap corruption in ENS related to SSL.

The backend instance had been running on its DR system.
The core dumps started after it was switched to its primary system.
The cores also caused a cluster fail-over to another server, where the cores continued.

The OS version was ruled out as part of the issue.
It was also noted that the issue did not seem to be related to MS

After further analysis, it appeared that this issue could be load-related, possibly due to a heap corruption problem caused when a process starts up and the first attempt to connect SSL to enpd fails with a timeout type problem.




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