Linux SRA probes hanging problem

The Storage Resource agent (SRA) probes use Logical Volume Manager (LVM) commands on Linux® that can hang for various reasons, for example, if a disk is suspended.

Problem

When a Storage Resource agent is deployed on a Linux host, it starts several Linux commands, including lvm pvs. The Storage Resource agent probe can hang at the same point that the lvm command stopped working.

On the IBM Spectrum® Control web user interface, the Storage Resource agent probe remains in an In Progress state and does not give any indication that the probe is hung.

Action

To verify that the lvm command is causing the SRA to hang, look at the SRA trace log on the SRA deployment and check that the last command run is an lvm command.

To solve the issue, follow these steps:
  1. Kill the hung SRA process.
  2. Kill the hung lvm command.
  3. Rerun the lvm pvs command from the command line.
  4. Verify that the lvm command runs successfully by running the pvdisplay command to display the volume details.
  5. Restart the SRA deployment.