After Applying Solaris OS Kernal Patch Oracle HTTP Server Stop Responding After a Short Period Of Time (Doc ID 2398929.1)

Last updated on MAY 01, 2023

Applies to:

Symptoms

After applying Solaris OS patch Oracle HTTP Server (OHS) listener appears to have slow performance and stop responding after running for as short as a few minutes to several hours.

Following symptoms are observed:

• No errors are recorded in log files.
• If multiple listeners are running it is possible that only one listener is affected.
• Issue is not protocol dependent (ssl/non-ssl).
• Sometimes the listener can start responding without any intervention.
• Restarting OHS resolves the issue temporarily.
• 100+ connections in close_wait status.  This is probably due to client "GET /" packets ack'd by server side but not received by OHS, thus resulting in client side closing the connection due to
  timeout and leaving sockets in CLOSE_WAIT state.
• tcpdumps on OHS server side show issue with network layer, sync and data packets are not ack'd by server/OHS side. Following are two examples.

Sync request not ack'd by server side, remote terminated connection

Changes

Issue started after applying Solaris Patch, following are some of the reported Solaris patches

M7 Jan 2018 patchset
OS patch to Oracle Solaris 11.3.29.5.0 

Cause

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