Summary

Inventory gathering ndtrack processes on Unix-like operating systems may hang while attempting to gather Java version details if a file named "java" that is not executable is found on the filesystem.

Symptoms

When this issue occurs, output in the tracker.log file from the ndtrack process will stop after logging that looks like either of the following:

[Wed 05 Jan 2022 10:05:28 AM -03 (G, 0)] {17500} The file '/usr/java/jre7/bin/java' has been detected as a possible package registry
[...]
[Wed 05 Jan 2022 10:05:41 AM -03 (G, 0)] {17500} IBM MQ inventory was unsuccessful either because it is not installed or there was an error.

Or:

[Wed 05 Jan 2022 10:05:28 AM -03 (G, 0)] {17500} The file '/usr/java/jre7/bin/java' has been detected as a possible package registry
[...]
[Wed 05 Jan 2022 10:05:41 AM -03 (G, 0)] {17500} Java product: "Java(TM) SE Runtime Environment", full version: "8.1.037", publisher: "", install location: "/usr/java/jre8/bin".

Cause

This issue is caused by a failure by the ndtrack process to handle files name "java" on the filesystem that cannot be executed.

In particular, log message(s) in the tracker.log file stating:

The file '<path>/java' has been detected as a possible package registry

will identify a <path> that does not appear in a subsequent log message:

Java project: <details...>

One of the java files thus identified will be triggering this issue.

Workaround

The inventory agent can be configured to avoid attempting to gather Java version details (and therefore avoid this issue) by setting the tracker component's PerformJavaScan preference to false.

This issue will also not occur if file scanning of directories that contain a problematic java executable is not performed. For example, this could be achieved by configuring the tracker component's ExcludeDirectory preference.

Additional information

Also see the following known issue which has similar symptoms but a different root cause: Inventory gathering process may terminate on Unix-like operating systems while gathering Java version details (IOJ-2241253)

Fix status

This issue has been fixed in the following FlexNet Manager Suite releases: 2019 R2.2 / Mar 2020 (Cloud), 2020 R1 (On Premises)

Other information

Affected components: Agent, Inventory

Master issue ID: IOJ-2072459

Also known as: FNML-67997