[
https://issues.apache.org/jira/browse/KYLIN-4191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andras Istvan Nagy updated KYLIN-4191:
--------------------------------------
Description:
I am using the real-time olap feature with a lambda datasource definition. When
executing a query that has a count(dim_field) in the select clause, where
"dim_field" is one of the dimension fields, I get a NPE from
org.apache.kylin.stream.core.query.StreamingTupleConverter.
(According to a colleague, a similar query used to work for some time in our
environment, and then stopped working, but I can't verify this statement.
Restarting the Kylin processes or disabling/enabling the cube does not "fix"
the issue.)
The relevant part of stacktrace seems to be:
{{Caused by: java.lang.NullPointerExceptionCaused by:
java.lang.NullPointerException at
org.apache.kylin.stream.core.query.StreamingTupleConverter.<init>(StreamingTupleConverter.java:86)
~[kylin-stream-core-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
org.apache.kylin.storage.stream.rpc.HttpStreamDataSearchClient.search(HttpStreamDataSearchClient.java:104)
~[kylin-storage-stream-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
org.apache.kylin.storage.stream.StreamStorageQuery.search(StreamStorageQuery.java:114)
~[kylin-storage-stream-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
org.apache.kylin.query.enumerator.OLAPEnumerator.queryStorage(OLAPEnumerator.java:114)
~[kylin-query-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
org.apache.kylin.query.enumerator.OLAPEnumerator.moveNext(OLAPEnumerator.java:60)
~[kylin-query-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at Baz$1$1.moveNext(Unknown
Source) ~[?:?] at
org.apache.calcite.linq4j.EnumerableDefaults.aggregate(EnumerableDefaults.java:116)
~[calcite-linq4j-1.16.0-kylin-r2.jar:3.0.0-SNAPSHOT]}}
Please see attached full stacktrace.
was:
I am using the real-time olap feature with a lambda datasource definition. When
executing a query that has a count(dim_field) in the select clause, where
"dim_field" is one of the dimension fields, I get a NPE from
org.apache.kylin.stream.core.query.StreamingTupleConverter.
(According to a colleague, a similar query used to work for some time in our
environment, and then stopped working, but I can't verify this statement.
Restarting the Kylin processes or disabling/enabling the cube does not "fix"
the issue.)
Please see stacktrace below.
> NPE in StreamingTupleConverter when querying count on a dimension field
> -----------------------------------------------------------------------
>
> Key: KYLIN-4191
> URL: https://issues.apache.org/jira/browse/KYLIN-4191
> Project: Kylin
> Issue Type: Bug
> Components: Real-time Streaming
> Affects Versions: v3.0.0-alpha
> Reporter: Andras Istvan Nagy
> Priority: Major
> Attachments: NPE.txt
>
>
> I am using the real-time olap feature with a lambda datasource definition.
> When executing a query that has a count(dim_field) in the select clause,
> where "dim_field" is one of the dimension fields, I get a NPE from
> org.apache.kylin.stream.core.query.StreamingTupleConverter.
> (According to a colleague, a similar query used to work for some time in our
> environment, and then stopped working, but I can't verify this statement.
> Restarting the Kylin processes or disabling/enabling the cube does not "fix"
> the issue.)
> The relevant part of stacktrace seems to be:
> {{Caused by: java.lang.NullPointerExceptionCaused by:
> java.lang.NullPointerException at
> org.apache.kylin.stream.core.query.StreamingTupleConverter.<init>(StreamingTupleConverter.java:86)
> ~[kylin-stream-core-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
> org.apache.kylin.storage.stream.rpc.HttpStreamDataSearchClient.search(HttpStreamDataSearchClient.java:104)
> ~[kylin-storage-stream-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
> org.apache.kylin.storage.stream.StreamStorageQuery.search(StreamStorageQuery.java:114)
> ~[kylin-storage-stream-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
> org.apache.kylin.query.enumerator.OLAPEnumerator.queryStorage(OLAPEnumerator.java:114)
> ~[kylin-query-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at
> org.apache.kylin.query.enumerator.OLAPEnumerator.moveNext(OLAPEnumerator.java:60)
> ~[kylin-query-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT] at Baz$1$1.moveNext(Unknown
> Source) ~[?:?] at
> org.apache.calcite.linq4j.EnumerableDefaults.aggregate(EnumerableDefaults.java:116)
> ~[calcite-linq4j-1.16.0-kylin-r2.jar:3.0.0-SNAPSHOT]}}
> Please see attached full stacktrace.
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
