Exception in thread "main" java.lang.UnsupportedClassVersionError: com/facebook/presto/cli/Presto : Unsupported major.minor version 51.0 about presto

[erichwang]

This is a classic Java exception that indicates that you are using the wrong version of Java for the class file. Presto is only compatible with Java 7, so you will need to install that on your machines. You can easily have both JDKs installed on the same machine and use JDK 6 for Hadoop and JDK 7 for Presto. The Presto launcher will simply use whichever "java" is first in PATH, so put JDK 7 first in your PATH before running the launcher.

Also, in the future, please post these types of operational questions to the presto-users group:
https://groups.google.com/forum/#!forum/presto-users
We typically reserve filing github issues for actual bugs.

[phoenixhadoop]

Ok，thank you very much ！

[phoenixhadoop]

https://groups.google.com/forum/#!forum/presto-users ，can not open

[phoenixhadoop]

Whether the presto has supported to SQL Querying on hbase currently?

[erichwang]

@phoenixhadoop, that page is publicly accessible. Maybe China firewall issue?

[phoenixhadoop]

Possible China firewall issue.Whether the presto has supported to SQL Querying on hbase currently?Please send me a confirmation .

[erichwang]

We are currently working on a direct HBase connector, however due to the wide variety of HBase data formats and layouts being used, it is likely that this connector will serve more as a guide for people building their own HBase connector for their own formats rather than just being able to use it right out of the box (unless it also happens to match our specific format). We may be able to pull out some shared libraries at a later time to make it easier for other people to write HBase connectors, but we have to see. This will probably be out sometime this half in 2014. In the meantime, there was some wind of people being able to refer to HBase through Hive extensions, but I'm not sure about the specifics.

Anyway, as I said before, this area is not a place to be asking questions. Please use the google group for further questions.