Abhishek Girish created DRILL-1750:
--------------------------------------
Summary: Querying directories with JSON files returns incomplete
results
Key: DRILL-1750
URL: https://issues.apache.org/jira/browse/DRILL-1750
Project: Apache Drill
Issue Type: Bug
Components: Storage - JSON
Reporter: Abhishek Girish
Assignee: Jacques Nadeau
I happened to observe that querying (select *) a directory with json files
displays only fields common to all json files. All corresponding fields are
displayed while querying each of the json files individually. And in some
scenarios, querying the directory crashes sqlline.
The example below may help make the issue clear:
> select * from dfs.`/data/json/tmp/1.json`;
+------------+------------+------------+
| artist | track_id | title |
+------------+------------+------------+
| Jonathan King | TRAAAEA128F935A30D | I'll Slap Your Face (Entertainment USA
Theme) |
+------------+------------+------------+
1 row selected (1.305 seconds)
> select * from dfs.`/data/json/tmp/2.json`;
+------------+------------+------------+------------+
| artist | timestamp | track_id | title |
+------------+------------+------------+------------+
| Supersuckers | 2011-08-01 20:30:17.991134 | TRAAAQN128F9353BA0 | Double Wide |
+------------+------------+------------+------------+
1 row selected (0.105 seconds)
> select * from dfs.`/data/json/tmp/3.json`;
+------------+------------+------------+
| timestamp | track_id | title |
+------------+------------+------------+
| 2011-08-01 20:30:17.991134 | TRAAAQN128F9353BA0 | Double Wide |
+------------+------------+------------+
1 row selected (0.083 seconds)
> select * from dfs.`/data/json/tmp/4.json`;
+------------+------------+
| track_id | title |
+------------+------------+
| TRAAAQN128F9353BA0 | Double Wide |
+------------+------------+
1 row selected (0.076 seconds)
> select * from dfs.`/data/json/tmp`;
+------------+------------+
| track_id | title |
+------------+------------+
| TRAAAQN128F9353BA0 | Double Wide |
| TRAAAQN128F9353BA0 | Double Wide |
| TRAAAEA128F935A30D | I'll Slap Your Face (Entertainment USA Theme) |
| TRAAAQN128F9353BA0 | Double Wide |
+------------+------------+
4 rows selected (0.121 seconds)
JVM Crash occurs at times:
> select * from dfs.`/data/json/tmp`;
+------------+------------+------------+
| timestamp | track_id | title |
+------------+------------+------------+
| 2011-08-01 20:30:17.991134 | TRAAAQN128F9353BA0 | Double Wide |
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f3cb99be053, pid=13943, tid=139898808436480
#
# JRE version: OpenJDK Runtime Environment (7.0_65-b17) (build
1.7.0_65-mockbuild_2014_07_16_06_06-b00)
# Java VM: OpenJDK 64-Bit Server VM (24.65-b04 mixed mode linux-amd64
compressed oops)
# Problematic frame:
# V [libjvm.so+0x932053]
#
# Failed to write core dump. Core dumps have been disabled. To enable core
dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /tmp/jvm-13943/hs_error.log
#
# If you would like to submit a bug report, please include
# instructions on how to reproduce the bug and visit:
# http://icedtea.classpath.org/bugzilla
#
Aborted
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