use MQ command ：mqrc 2009
2009 0x000007d9 MQRC_CONNECTION_BROKEN express MQ Disconnection , The official reason is that the network is disconnected .
Make sure the network is in good condition
MQ Server connection timeout
MQ The server and client program will send heartbeat notification regularly （ default 5 second ）, If MQ The server cannot receive heartbeat notification in time , You will be disconnected from the client program , It can also lead to MQ2009 error .
see mq Error log path ：
/var/mqm/qmgrs/ Queue manager name /errors
AMQ9513: Maximum number of channels reached .
modify MQ Number of channels /var/mqm/qmgrs/ Queue manager name /qm.ini
enlarge MQ The maximum number of connection channels and the maximum number of active connection channels
（1） stop it MQ Queue manager
endmqm -i Queue manager name
（2） modify MQ Queue manager
vi /var/mqm/qmgrs/ Queue manager name /qm.ini Save after modifying the following CHANNELS: MaxChannels=2000
（3） start-up MQ Queue manager ( Bring the amendment into effect )
strmqm Queue manager name