Transport Endpoint Not Connected - Mesos Slave / Master

Question

I\'m trying to connect a Mesos slave to its master. Whenver the slave tries to connect to the master, I get the following message:

I0806 16:39:59.090845   93         


        

Answer 1

I've run into this error in the logs when upgrading mesos versions (e.g. 0.20.0 -> 0.27.0). Sometimes the data from the previous version is incompatible with other versions.

Here is how I remedied it:

First ensure all nodes have the mesos-master service stopped:

sudo service mesos-master stop

Then clear out all potential old data:

1. Remove $MESOS_WORK_DIR (/var/mesos in my case):

   sudo rm -rf /var/mesos
   

2. Clear our mesos data in ZooKeeper:

   $ zkCli.sh
   WatchedEvent state:SyncConnected type:None path:null
   [zk: localhost:2181(CONNECTED) 0] rmr /mesos
   [zk: localhost:2181(CONNECTED) 0] quit
   Quitting...
   

After doing these steps I started the mesos-master service on all nodes and it came back online.