I checked the pxgremediate.log file . I found the issue
Exception Detail: [Errno 13] Permission denied
Traceback: Traceback (most recent call last):
File "/apps/splunk/etc/apps/Splunk_TA_cisco-ise/bin/pxgremediate.py", line 131, in pxgremediate
java_result = subprocess.Popen(java_cmd, stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
File "/apps/splunk/lib/python2.7/subprocess.py", line 711, in __init__
errread, errwrite)
File "/apps/splunk/lib/python2.7/subprocess.py", line 1308, in _execute_child
raise child_exception
OSError: [Errno 13] Permission denied
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