Difference between revisions of "Server Restart Sequence"

Latest revision as of 11:23, 17 October 2019

When an installation employs memcached or the Messaging Server, it is important to follow this sequence when restarting servers:

/etc/init.d/messaging stop {hornetq-folder}/bin/stop.sh

{install-dir}/profiles/IS_default/bin/shutdown.sh

/bin/memcached -d stop

/bin/memcached -d start -p {port} -u {user} -m {MB_of_memory}

  # Typical values:
  #    Port: 11211,  User: root,  MB of memory: 25

{install-dir}/profiles/IS_default/bin/startup.sh

{hornetq-folder}/bin/start.sh /etc/init.d/messaging start </syntaxhighlight>

Considerations

Stopping application servers ensures that they aren't adding entries to the cache.
Stopping memcached makes sure that the cache is flushed.
Those two steps can occur in either order. It is the next two for which order is critical:

Restarting memcached first makes sure that a clean copy of the cache is available.
When the application servers come up, they use the clean cache.

@@ Line 1: / Line 1: @@
 <includeonly>=== Server Restart Sequence ===</includeonly>
-When an installation employs <tt>memcached</tt>, it is important to follow this sequence when restarting servers:
+When an installation employs <tt>memcached</tt> or the [[Platform Installation Guide (printable)#Messaging Server Installation|Messaging Server]], it is important to follow this sequence when restarting servers:
-# Stop the messaging server:
-#: <tt>/etc/init.d/messaging stop</tt>
-#: <tt>{hornetq-folder}/bin/stop.sh</tt>
 :<syntaxhighlight lang="bash" enclose="div">
+# STOP THE MESSAGING SERVER, if one is running:
+/etc/init.d/messaging stop
+{hornetq-folder}/bin/stop.sh
 # STOP ALL APPLICATION SERVERS
 # On each server:
+{install-dir}/profiles/IS_default/bin/shutdown.sh
 # STOP ALL memcached SERVERS
 # On each server:
+/bin/memcached -d stop
 # START ALL memcached SERVERS
 # On each server:
+/bin/memcached -d start -p {port} -u {user} -m {MB_of_memory}
+   # Typical values:
+   #    Port: 11211,  User: root,  MB of memory: 25
+# START ALL APPLICATION SERVERS
+# On each server:
+{install-dir}/profiles/IS_default/bin/startup.sh
 # START THE MESSAGING SERVER, if you're running one:
+{hornetq-folder}/bin/start.sh
+/etc/init.d/messaging start
 </syntaxhighlight>
-: <tt>{hornetq-folder}/bin/start.sh</tt>
-: <tt>/etc/init.d/messaging start</tt>
 ;Considerations: