[DRILL-8139] Parquet CodecFactory thread safety bug

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.19.0
• Component/s: Storage - Parquet
• Assignee: James Turton
• Reporter: James Turton
• Created: 16/Feb/22 14:20
• Updated: 17/Feb/22 18:09
• Resolved: 17/Feb/22 17:02

Description

Update: PARQUET-2126 has been opened to describe the underlying thread safety problem in parquet-mr.  The rdblue/brotli-codec is also affected.

In previously released versions of Drill, back to at least 1.17, this bug only appears under the combination of the async column reader and the sync page reader, as per the reproduction script below.  In master, the bug appears under the async column reader and both the sync and async page readers.

set `store.parquet.compression` = 'gzip';
drop table if exists dfs.tmp.m;
create table dfs.tmp.m as select * from cp.`tpch/supplier.parquet`;
set `store.parquet.reader.pagereader.async` = false;
set `store.parquet.reader.columnreader.async` = true;
select * from dfs.tmp.m order by s_suppkey; – repeat this last query and watch the returned data. Eventually you will also failed queries or JVM crashes

 

Issue Links

• is fixed by: PARQUET-2126 Thread safety bug in CodecFactory