Intermittent Login Failure on Shared Filesystem; Apache error_log Shows "mod_oc4j: pt_alloc failed"
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.
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: Failed to parse OC4J proc ready notification (missing ons info)
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.
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