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From "Flavio Pompermaier (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-4523) phoenix.schema.isNamespaceMappingEnabled problem
Date Mon, 08 Jan 2018 15:24:00 GMT
Flavio Pompermaier created PHOENIX-4523:
-------------------------------------------

             Summary: phoenix.schema.isNamespaceMappingEnabled problem
                 Key: PHOENIX-4523
                 URL: https://issues.apache.org/jira/browse/PHOENIX-4523
             Project: Phoenix
          Issue Type: Bug
    Affects Versions: 4.13.1
            Reporter: Flavio Pompermaier


I'm using Phoenix 4.13 for CDH 5.11.2 parcel and enabling schemas made my code unusable.
I think that this is not a bug of the CDH release, but of all 4.13.x releases.
I have many parallel Phoenix connections and I always get the following exception:

Caused by: java.sql.SQLException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hbase.TableExistsException):
SYSTEM:MUTEX
	at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:2492)
	at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:2384)
	at org.apache.phoenix.util.PhoenixContextExecutor.call(PhoenixContextExecutor.java:76)
	at org.apache.phoenix.query.ConnectionQueryServicesImpl.init(ConnectionQueryServicesImpl.java:2384)
	at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(PhoenixDriver.java:255)
	at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver.createConnection(PhoenixEmbeddedDriver.java:150)
	at org.apache.phoenix.jdbc.PhoenixDriver.connect(PhoenixDriver.java:221)
	at java.sql.DriverManager.getConnection(DriverManager.java:664)
	at java.sql.DriverManager.getConnection(DriverManager.java:270)

This is caused by the fact that all the times the SYSTEM tables are recreated, and this cannot
be done simultaneously.

Trying to debug the issue I found that in ConnectionQueryServicesImpl.createSysMutexTable()
the call to getSystemTableNames() always return an empty array and the SYSTEM.MUTEX  table
is always recreated.
This because getSystemTableNames() doesn't consider the case when system tables have namespace
enabled. Right now that method tries to get all tables starting with *SYSTEM.**, while it
should try to get the list of *SYSTEM:* tables..

I hope this could get fixed very soon,
Flavio



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