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Title
The SharePlex Manager does not come up after upgrade of Linux operating system -
Description
After SharePlex Manager is shutdown for a Linux patching and upon subsequent restart, the SharePlex Manager fails to come up.
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Cause
The Java Virtual Machine (JVM) crashes due to insufficient memory when Foglight Management Server (FMS) attempts to start as a part of restart of SharePlex Manager. The SharePlex Manager is a cartridge plugged into Foglight. If Foglight fails to start, then SharePlex Manager will not restart.
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Resolution
The issue is related to Foglight. The article 230903 exists for this issue except that in our case the Agent Manager (FglAM) is not required and the problem is only confined to FMS hence this article contains only an excerpt from article 230903.
After installing an operating system patch on a Linux machine, the FMS does not start up anymore. It failed with a Java Virtual Machine memory allocation error.
In June 19, 2017, Red Hat released a new fix which addressing the CVE-2017-1000364 kernel: heap/stack gap jumping via unbounded stack allocations.
This fix caused a new issue for several Red Hat versions and all Linux systems which applied the CSV fixing “JVM crashes after updating to kernel with patch for Stack Guard flaw (CVE-2017-1000364)”
The resolution from Red Hat is to upgrade to its newer kernel version. Problematic kernel version is: 2.6.32-696.3.2.el6.x86_64.
If a kernel upgrade is not possible please follow the workaround below to get Foglight up and running again.
Preferred Solution:
Follow Red Hat KB3091371 upgrade to new Linux kernel.
Workaround:
To fix the issue in Foglight Management Server (FMS) please set the following parameter:
1. Connect to the FMS server
2. Go to "FGL_HOME/config"
3. Make a backup copy of the file "server.config"
(On FMS 5.5.8, the config file is named foglight.config)
4. Find next available server.vm.option and put line like this server.vm.optionx = "-Xss2m ";
X is next available number
(On FMS 5.5.8, the parameter has to be added to a line named foglight.vm.optionX. e.g. foglight.vm.option0 = “-Xss2m”)
5. Once the change is done, please start the FMS