Failed to receive heartbeat from agent. CM server guid

[#1]

Hi

My install fails when it tries to get heartbeat from newly installed agent.

I tried a few things suggested on the interenet by other users, such as cleaning the folders:

  rm /var/lib/cloudera-scm-agent/ -rf
  rm /var/lib/cloudera-scm-server/ -rf

then I uninstalled and reinstalled:

/usr/share/cmf/uninstall-cloudera-manager.sh

 ./cloudera-manager-installer.bin

But the error on step 5 of the install wizard is always :

Installation failed. Failed to receive heartbeat from agent.

LOG SNIPPET:

BEGIN sudo tail -n 50 /var/log/cloudera-scm-agent//cloudera-scm-agent.log | sed 's/^/>>/'
>>[01/Feb/2018 12:29:01 +0000] 68880 MainThread agent ERROR Error, CM server guid updated, expected eb29c04c-7699-43d6-8896-ea6024c0edc2, received 40d851ea-2dd7-4a6d-8840-410425111154
>>[0

 >>[01/Feb/2018 12:49:29 +0000] 71602 MainThread __init__ ERROR Failed to generate and store Agent UUID

>>IOError: [Errno 2] No such file or directory: '/var/lib/cloudera-scm-agent/uuid'
>>[01/Feb/2018 12:49:29 +0000] 71602 Dummy-1 daemonize WARNING Stopping daemon.
>>[01/Feb/2018 13:02:19 +0000] 73786 MainThread __init__ INFO Generating Agent UUID for the first time: '/var/lib/cloudera-scm-agent/uuid'
>>[01/Feb/2018 13:02:19 +0000] 73786 MainThread __init__ ERROR Failed to generate and store Agent UUID
>>Traceback (most recent call last):
>> File "/usr/lib64/cmf/agent/build/env/lib/python2.7/site-packages/cmf-5.14.0-py2.7.egg/cmf/util/__init__.py", line 414, in get_host_uuid
>> uuid_file = open(uuid_path, 'w')
>>IOError: [Errno 2] No such file or directory: '/var/lib/cloudera-scm-agent/uuid'
>>[01/Feb/2018 13:02:19 +0000] 73786 Dummy-1 daemonize WARNING Stopping daemon.
END (0)
end of agent logs.

[#2 · Accepted solution]

@NewBee22,

The key error in your output is:

Failed to generate and store Agent UUID

When the agent starts, it will check /var/lib/cloudera-scm-agent/ to see if there is a "uuid" file.  If there isn't, the agent will create the file with a unique uuid value.  It seems this operation fails.

Since the agent runs as root, it is possible there is something else preventing file creation

I suggest looking at the file path. Run:

# ls -lrt /var/lib/cloudera-scm-agent

Since we see that uuid_file = open(uuid_path, 'w') fails I believe that it is most likely that "cloudera-scm-agent" does not exist.

If it doesn't, create /var/lib/cloudera-scm-agent and try restarting the agent.