[KYLIN-2074] Error happens when click the "SQL" section of cube

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: v1.5.4.1
• Fix Version/s: v1.6.0
• Component/s: REST Service
• Assignee: Shao Feng Shi
• Reporter: Shao Feng Shi
• Created: 09/Oct/16 14:06
• Updated: 04/Feb/18 11:37
• Resolved: 05/Jan/17 05:28

Description

Qiutongxin (qiutongxin at jd.com) from mailing list reported this bug: an error thrown when click the "SQL" tab of a cube, in kylin.log there is this NPE:

ERROR [http-bio-8070-exec-2] controller.BasicController:44 :
java.lang.NullPointerException
        at org.apache.kylin.engine.EngineFactory.batchEngine(EngineFactory.java:44)
        at org.apache.kylin.engine.EngineFactory.getJoinedFlatTableDesc(EngineFactory.java:58)
        at org.apache.kylin.rest.controller.CubeController.getSql(CubeController.java:154)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

Checking the REST call between web and server, the segment name be passed in the REST URL is 'null': http://localhost:7070/kylin/api/cubes/embedded_cube/segs/null/sql

Issue Links

• duplicates: KYLIN-2078 Can't see generated SQL at Web UI