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NetWorker: How to enable RabbitMQ Debugging

Summary: This KB serves as an overview of the rabbitmq service, associated log files, and additional debugging that can be applied.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Instructions

RabbitMQ

RabbitMQ is used by NetWorker servers as a message Broker agent service; it provides a message queuing mechanism in between the NetWorker server process (nsrd) and other services used by NetWorker, for example: authc, NetWorker Management Console (NMC), NetWorker Web User Interface (NWUI), and so on. RabbitMQ service issues cause the NetWorker server service to shut down; general messages are logged in the NetWorker server's daemon.raw:

  • Linux: /nsr/logs/daemon.raw
  • Windows: ..\Program Files\EMC NetWorker\nsr\logs\daemon.raw
    137911 YYYY-MM-DD HH:mm:SS AM/PM  5 5 0 313919296 1615791 0 NW_SERVER-NAME nsrctld NSR critical Aborting startup sequence: Process /opt/nsr/rabbitmq-server-3.8.18/bin/rabbitmq-server exited in less than 10 seconds at startup: exit code 0
    127108 YYYY-MM-DD HH:mm:SS AM/PM  5 5 0 313919296 1615791 0 NW_SERVER-NAME nsrctld NSR critical Failed to start all daemons; shutting down...
  • How to render the daemon.raw: https://www.dell.com/support/kbdoc/000022793/

 

Log Files:

The log path varies depending on the rabbitmq-server version used. NetWorker versions may include newer versions of RabbitMQ. Version-specific details can be found in the NetWorker Installation and NetWorker Administration guides, available through: https://www.dell.com/support/home/en-us/product-support/product/networker/docs

Linux Log Locations:
/nsr/logs/daemon.raw NetWorker services log
/opt/nsr/rabbitmq-server*/var/log/rabbitmq/log/crash.log RabbitMQ crash logs, this directory contains crash.log# depending on log rotation.
/opt/nsr/rabbitmq-server*/var/log/rabbitmq/rabbit@localhost.log RabbitMQ general log
/opt/nsr/rabbitmq-server*/var/log/rabbitmq/rabbit@localhost_upgrade.log RabbitMQ upgrade log
/nsr/tmp/rabbitmq/cores/erl_crash.dump Crash stack trace logs

 

Windows Log Locations (Default Install Location)
C:\Program Files\EMC NetWorker\nsr\logs\daemon.raw NetWorker services log
C:\Program Files\EMC NetWorker\nsr\tmp\RabbitMQ\log\log\crash.log RabbitMQ crash logs, this directory contains crash.log# depending on log rotation.
C:\Program Files\EMC NetWorker\nsr\tmp\RabbitMQ\log\rabbit@HOSTNAME.log RabbitMQ general log
C:\Program Files\EMC NetWorker\nsr\tmp\RabbitMQ\log\rabbit@HOSTNAME_upgrade.log RabbitMQ upgrade log
C:\Program Files\EMC NetWorker\nsr\tmp\RabbitMQ\cores\erl_crash.dump Crash stack trace logs

 

Debugging:

Debugging options can vary depending on the RabbitMQ version. The version is indicated by the rabbitmq-server folder under:

  1. NetWorker 19.6-19.9: 3.8.18
  2. NetWorker 19.10: 3.11.16
  1. Linux: /opt/nsr/rabbitmq-server-#.#.#
  2. Windows: ..\Program Files\EMC NetWorker\nsr\rabbitmq-server-#.#.#
    1. Make a copy of the original rabbitmq.config.
      Linux: /opt/nsr/rabbitmq-server-3.8.18/etc/rabbitmq/rabbitmq.config
      Windows: ..\Program Files\EMC NetWorker\nsr\rabbitmq-server-3.8.18\etc\rabbitmq.config
    2. Edit the rabbitmq.config file to contain the following lines:
      Linux:
      %% {log_levels, [{channel, info}, {connection, info}, {federation, info}, {mirroring, info}]},
            {log_levels, [{connection, debug}, {queue, debug}]},
                 {log,
                      [{file, [{level, debug}]},
                      {categories,
                          [{connection,
                              [{level, debug}]
                          },
                          {queue,
                              [{level, debug}]
                          }
                          ]
                      }]
                  },
      NOTE: The comment line (%%) is there already, the changes can be added under this line.
      Windows:
      Add the following highlighted lines at the top of the file.
      [  
       {rabbit, 
       [{tcp_listeners, []}, 
       {log_levels, [{connection, debug}, {queue, debug}]},
                 {log,
                      [{file, [{level, debug}]},
                      {categories,
                          [{connection,
                             [{level, debug}]
                          },
                          {queue,
                              [{level, debug}]
                          }
                          ]
                      }]
                  },            
          {ssl_listeners, [5671]}, 
    3. Attempt to start NetWorker services:
      Linux: systemctl restart networker
      Windows: net stop nsrd /y && net start nsrd
    4. Monitor the rabbit@localhost.log (if Linux), rabbit@NODE.log (if Windows), and crash.log for errors which may be preventing RabbitMQ startup.

 

WARNING: The purpose of this debugging is for active troubleshooting. For example, when RabbitMQ fails to start. It should not be left enabled and unattended on an active NetWorker server. If RabbitMQ is operational, this debugging can consume thousands of port connections to java which can stop responding the NetWorker server and its user interfaces. When you are done troubleshooting, remove the debugging by reverting the rabbitmq.config file to its default settings, or revert to the copy of the rabbitmq.config file created before debug lines were added. Restarting NetWorker services is required for RabbitMQ to reload the config file after debugging has been disabled.

 

When RabbitMQ is running, the NetWorker server should have port 5671 (SSL) listening.

nsrports -t localhost -p 5671

You can use the following commands to get the Process ID (PID) of the process listening on 5671. The process associated with port 5671 should be from rabbitmq-server.

Linux:

netstat -apno | grep 5671
ps -ef | grep PID

Example:

nve:~ # netstat -apno | grep 5671
tcp        0      0 192.168.9.101:52676     192.168.9.101:5671      ESTABLISHED 2607/gstd           keepalive (5922.75/0/0)
tcp        0      0 :::5671                 :::*                    LISTEN      5238/beam.smp       off (0.00/0/0)
tcp        0      0 192.168.9.101:52654     192.168.9.101:5671      ESTABLISHED 2128/java           off (0.00/0/0)
tcp        0      0 ::1:5671                ::1:50974               ESTABLISHED 5238/beam.smp       off (0.00/0/0)
tcp        0      0 ::1:50974               ::1:5671                ESTABLISHED 5519/nsrjobd        keepalive (5922.75/0/0)
tcp        0      0 192.168.9.101:52668     192.168.9.101:5671      ESTABLISHED 2128/java           off (0.00/0/0)
tcp        0      0 192.168.9.101:5671      192.168.9.101:52654     ESTABLISHED 5238/beam.smp       off (0.00/0/0)
tcp        0      0 192.168.9.101:5671      192.168.9.101:52676     ESTABLISHED 5238/beam.smp       off (0.00/0/0)
tcp        0      0 192.168.9.101:5671      192.168.9.101:52668     ESTABLISHED 5238/beam.smp       off (0.00/0/0)

nve:~ # ps -ef | grep 5238
root      5238  5232  0 Jun05 ?        00:02:55 /opt/nsr/rabbitmq-server-3.11.16/erts-13.2.2/bin/beam.smp -W w -MBas ageffcbf -MHas ageffcbf -MBlmbcs 512 -MHlmbcs 512 -MMmcs 30 -P 1048576 -t 5000000 -stbt db -zdbbl 128000 -sbwt none -sbwtdcpu none -sbwtdio none -B i -- -root /opt/nsr/rabbitmq-server-3.11.16 -bindir /opt/nsr/rabbitmq-server-3.11.16/erts-13.2.2/bin -progname erl -- -home /nsr/rabbitmq -- -pa  -noshell -noinput -s rabbit boot -boot start_sasl -syslog logger [] -syslog syslog_error_logger false -kernel prevent_overlapping_partitions false
root      5247  5238  0 Jun05 ?        00:00:00 erl_child_setup 1024
root     26598 26408  0 11:42 pts/0    00:00:00 grep --color=auto 5238

 

Windows:

netstat -ano | findstr 5671
wmic process where "ProcessID='PID'" get ProcessID,ExecutablePath

Example:

PS C:\Users\Administrator.AMER> netstat -ano | findstr 5671
  TCP    0.0.0.0:5671           0.0.0.0:0              LISTENING       356
  TCP    192.168.9.123:5671     192.168.9.123:63097    ESTABLISHED     356
  TCP    192.168.9.123:5671     192.168.9.123:63098    ESTABLISHED     356
  TCP    192.168.9.123:63097    192.168.9.123:5671     ESTABLISHED     6324
  TCP    192.168.9.123:63098    192.168.9.123:5671     ESTABLISHED     6324
  TCP    [::]:5671              [::]:0                 LISTENING       356
  TCP    [::1]:5671             [::1]:63105            ESTABLISHED     356
  TCP    [::1]:5671             [::1]:63106            ESTABLISHED     356
  TCP    [::1]:63105            [::1]:5671             ESTABLISHED     4676
  TCP    [::1]:63106            [::1]:5671             ESTABLISHED     776

PS C:\Users\Administrator.AMER> wmic process where "ProcessID='356'" get ProcessID,ExecutablePath
ExecutablePath                                                         ProcessId
C:\Program Files\EMC NetWorker\nsr\rabbitmq-server-3.8.18\bin\erl.exe  356

 

Additional Information

Affected Products

NetWorker

Products

NetWorker Family, NetWorker Series
Article Properties
Article Number: 000212107
Article Type: How To
Last Modified: 18 Jul 2024
Version:  5
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