[AMBARI-13923] Ambari Blueprint deployment fails during HBase Client install: "TypeError: expected string or buffer"

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Cannot Reproduce
• Affects Version/s: 2.1.0
• Fix Version/s: 2.2.0
• Component/s: ambari-server, blueprints, stacks

Environment

HDP 2.3

• Assignee: Amruta Borkar
• Reporter: Hari Sekhon
• Created: 17/Nov/15 15:13
• Updated: 08/Mar/16 19:52
• Resolved: 08/Mar/16 19:49

Description

When deploying a cluster using blueprints the install fails with the following exception:

Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/common-services/HBASE/0.96.0.2.0/package/scripts/hbase_client.py", line 80, in <module>
    HbaseClient().execute()
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 216, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/common-services/HBASE/0.96.0.2.0/package/scripts/hbase_client.py", line 32, in install
    import params
  File "/var/lib/ambari-agent/cache/common-services/HBASE/0.96.0.2.0/package/scripts/params.py", line 26, in <module>
    from params_linux import *
  File "/var/lib/ambari-agent/cache/common-services/HBASE/0.96.0.2.0/package/scripts/params_linux.py", line 106, in <module>
    regionserver_xmn_size = calc_xmn_from_xms(regionserver_heapsize, regionserver_xmn_percent, regionserver_xmn_max)
  File "/var/lib/ambari-agent/cache/common-services/HBASE/0.96.0.2.0/package/scripts/functions.py", line 34, in calc_xmn_from_xms
    heapsize = int(re.search('\d+',heapsize_str).group(0))
  File "/usr/lib64/python2.7/re.py", line 142, in search
    return _compile(pattern, flags).search(string)
TypeError: expected string or buffer

There is a similar bug AMBARI-5066 but that one was resolved in Ambari 1.5 and this is Ambari 2.1

Looking at the code it looks like it should be testing the heapsize_str variable is actually a string before passing it to re.search in /var/lib/ambari-agent/cache/common-services/HBASE/0.96.0.2.0/package/scripts/functions.py, or probably catch in an earlier calling method and raise the source issue to the user, ie "you forgot to enter a value for parameter X", or just set a default value if none is passed.