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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-1859) IllegalReferenceCountException in the decoder inside Netty
Date Fri, 12 Dec 2014 22:06:13 GMT
Aman Sinha created DRILL-1859:

             Summary: IllegalReferenceCountException in the decoder inside Netty
                 Key: DRILL-1859
                 URL: https://issues.apache.org/jira/browse/DRILL-1859
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - RPC
    Affects Versions: 0.7.0
            Reporter: Aman Sinha

The following query does a LIMIT inside a subquery to force a UnionExchange and then does
an ORDER-BY outside that will first re-distribute the data before sorting.  It results in
a DecoderException in netty.

0: jdbc:drill:zk=local> alter session set `planner.slice_target` = 10;
|     ok     |  summary   |
| true       | planner.slice_target updated. |
0: jdbc:drill:zk=local> select t2.o_custkey from (select o_orderkey, o_custkey from cp.`tpch/orders.parquet`
t1 group by o_orderkey, o_custkey limit 10) t2 order by t2.o_custkey;
Query failed: Query failed: Failure while running fragment., refCnt: 0, decrement: 1 

Here's partial output from the logs: (will attach full error log).  
io.netty.handler.codec.DecoderException: io.netty.util.IllegalReferenceCountException: refCnt:
0, decrement: 1

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