1823580 - issue with HANA scale out system using fibre channel client

Symptom

HANA scale out system installed with revision < 50 using fibre channel client of the HANA storage connector API not starting after upgrade to revision 50 or later.
Symptom 1:
Nameserver Trace shows the following: ha_provider PythonProxyImpl.cpp(00145) : about(): import fcClient failed: No module named fcClient
Symptom 2:
Nameserver Trace shows: ha_fcClient  ServiceClient.py(00030): could not reload multipath topology

Other Terms

HANA, IMDB, storage connector API, fibre channel client, scale out

Reason and Prerequisites

You have a HANA scale out system using the fibre channel client of the
HANA storage connector API. After the upgrade to revision 50 or later the system is not starting anymore.
If you are not sure if you are using the fibre channel client of the HANA storage connector API please contact your hardware partner.

Solution

For both of the issues make sure the following configuration is set correctly:
In the global.ini file under section [storage]:
ha_provider = hdb_ha.fcClient
In the Linux config file /etc/sudoers make sure the entry for the sidadm user is as follows on all nodes of the scale out system:
sidadm ALL=NOPASSWD: /sbin/multipath, /sbin/multipathd, /etc/init.d/multipathd, /usr/bin/sg_persist, /bin/mount, /bin/umount, /bin/kill, /usr/bin/lsof
Restart HANA DB after making these changes.

These changes are compatible with revisions below 50, so you can adjust these settings before starting the upgrade.

Header Data

Released On	25.02.2013 10:52:12
Release Status	Released for Customer
Component	HAN-DB SAP HANA Database
Priority	Correction with high priority
Category	Program error