Trying to run Presto coordinator server with discovery server embedded on AWS CDH4 cluster
config.properties:
coordinator=true
datasources=jmx
http-server.http.port=8000
presto-metastore.db.type=h2
presto-metastore.db.filename=var/db/MetaStore
task.max-memory=1GB
discovery-server.enabled=true
discovery.uri=http://ip-10-0-0-11:8000
When server starts it can't register itself with discovery (relevant logs):
2013-11-08T19:38:38.193+0000 WARN main Bootstrap Warning: Configuration property 'discovery.uri' is deprecated and should not be used
2013-11-08T19:38:38.968+0000 INFO main Bootstrap discovery-server.enabled false true
2013-11-08T19:38:38.975+0000 INFO main Bootstrap discovery.uri null http://ip-10-0-0-11:8000 Discovery service base URI
2013-11-08T19:38:40.916+0000 ERROR Discovery-0 io.airlift.discovery.client.CachingServiceSelector Cannot connect to discovery server for refresh (collector/general): Lookup of collector failed for http://ip-10-0-0-11:8000/v1/service/collector/general
2013-11-08T19:38:42.556+0000 ERROR Discovery-1 io.airlift.discovery.client.CachingServiceSelector Cannot connect to discovery server for refresh (presto/general): Lookup of presto failed for http://ip-10-0-0-11:8000/v1/service/presto/general
2013-11-08T19:38:43.854+0000 INFO main org.eclipse.jetty.server.AbstractConnector Started SelectChannelConnector@0.0.0.0:8000
Tried to also run standalone Discovery server, same effect. Looks that listener is started after registration attempt is made.
I was wondering if someone would notice this in the logs :) It's actually not a problem. The error appears because the discovery client starts before the discovery server is ready. You'll see "succeeded for refresh" shortly after in the logs which shows that it's working. We will fix the log message eventually but it's purely a cosmetic issue.