Intermittent Login Failure on Shared Filesystem; Apache error_log Shows "mod_oc4j: pt_alloc failed" (Doc ID 787116.1)

Last updated on JULY 15, 2016

Applies to:

Oracle Applications Technology Stack - Version 12.0.4 to 12.1.3 [Release 12.0 to 12.1]
Information in this document applies to any platform.

Symptoms

At random occasions, typically multiple times per day, the users cannot login. Restarting the iAS appears to resolve the issue immediately, but only for a short term.

The apache error_log has entries similar to the following:

[error] mod_oc4j: pt_alloc failed
[error] mod_oc4j: Failed to parse OC4J proc ready notification (missing ons info)




Changes

Potential changes that might cause this are:

1. Implementing a shared filesystem such that the Apache log files are written to an NFS mount.

2. Upgrading the OS from Red Hat Linux 3 (bad NFS implementation) to Red Hat Linux 4 or higher (NFS in compliance with NFS specification).

3. Defining the environment variable DEFAULT_DMS_DIR in the iAS environment.

4. Setting the AutoConfig parameter "s_lock_pid_dir" to an invalid location.

Cause

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