MCS says 'service unavailable' when I define MAPR_EXTERNAL for each node

[Tim11]

We have a cluster with 7 nodes and 3 are used for the CLDB.

When I define MAPR_EXTERNAL in env_override.sh for the CLDB nodes leaving no entry for the other nodes, then the MCS is reachable but our client code doesn't work because the CLDB is returning a private IP for a service.

If I define MAPR_EXTERNAL in env_override.sh for all 7 nodes then the client code works fine. But when I try to go to the MCS I get this

 

Literally the only change is defining MAPR_EXTERNAL in /opt/mapr/conf/env_override.sh for the four non-CLDB nodes.

Any ideas would be welcome.

thanks,

Tim

[Dave Olker · Accepted solution]

I did a quick search of the public HPE Support Portal (https://support.hpe.com) and found this article:

MCS service unavailable when MAPR_EXTERNAL is used in MapR 6.1.0

https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=sf000079398en_us

Hope this helps,

Dave

[Tim11]

Dave,

You cracked it! I literally have been struggling with this for weeks. MCS would only come up when I defined MAPR_EXTERNAL for the CLDB nodes. But the error message from my client would spit out a private IP of a non-CLDB node. But thanks to you I now define MAPR_EXTERNAL for all nodes and the maprDB client works with no problem.

Thank you!

Tim

[Dave Olker]

Tim,

Glad it fixed your problem.  If you run into any other issues, it's always worth a quick search of the knowledge articles on support.hpe.com just in case someone else ran into the same issue and we documented the solution.

Regards,

Dave

[Tim11]

Dave,

You're so right. I realize now that the support pages aren't indexed by google and so I'll have to add it to my places to check. I made a related post in July and put your answer there too so they'll turn up in a google search since the community forum pages are indexed by google.

Thanks again for your help

regards,

Tim