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Updating DataStage Stops the MettleCI Unit Test Harness Working for Parallel Jobs

Owned by John McKeever
Last updated: Feb 24, 2021
2 min read

Problem

You ran a DataStage patch installer and now the Parallel Unit Test harness does not work.

Cause

The IBM update installer may destroy the osh symbolic link created by MettleCI.

Solution

There are two ways to address this, one using a reinstall with the force option, and one that manually fixes the required symbolic link:

Reinstall

The fix procedure with the least opportunity to cause damage is to…

  1. verify that osh is not a symlink,

  2. backup and remove osh-ibm and osh-dm, and

  3. reinstall MettleCI Unit Test Harness using the force option (if installing the same version). Consult your O/S-specific documentation on how to force the installation of an rpm package. On many systems using rpm it will be -replacepkgs

This procedure ensures you only perform destructive operations to osh-dm (which is easily replaceable) and osh-ibm which is the renamed version of osh which was overwritten by the DataStage patch install process.

There is a risk if one inadvertently attempts this procedure when osh is actually a symlink, thereby deleting the only copy of osh. However, this is lower risk than deleting osh-ibm and recreating the symlink manually.

Manually fixing the file

If you want to manually fix the Parallel execution infrastructure on a Unix-based system you can manually restore the affected files as follows: (as user dstage)

$> mv osh-ibm osh-ibm.bad $> mv osh osh-ibm $> ln -s osh-dm osh

This will restore harness operation.

See also

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