Hbase managed zookeeper suddenly trying to connect to localhost instead of zookeeper quorum

Question

I was running some tests with table mappers and reducers on large scale problems. After a certain point my reducers started failing when the job was 80% done. From what I

Answer 1

Hard to say what is happening with the information, given. I have found the Hadoop Stack (HBase especially) to be quite hostile to even the slightest bit of misconfiguration in DNS or the hosts file.

As the quorum in your hbase-site.xml looks good, I'd start checking with network/hostname resolution related configurations:

• Has the nodename slipped into the localhost entry in /etc/hosts on hdev03?
• Is there an entry for the host itself in hdev03s /etc/hosts (there should)?
• Has Reverse DNS been correctly configured in case you are using DNS for name resolution instead of the hosts file?

These are just a few pointers in the direction I'd look with this kind of issue. Hope it helps!