[jira] [Created] (HIVE-19424) NPE In MetaDataFormatters

["BELUGA BEHR (JIRA)" <ji...@apache.org>]

BELUGA BEHR created HIVE-19424:
----------------------------------

             Summary: NPE In MetaDataFormatters
                 Key: HIVE-19424
                 URL: https://issues.apache.org/jira/browse/HIVE-19424
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2, Metastore, Standalone Metastore
    Affects Versions: 3.0.0, 2.4.0
            Reporter: BELUGA BEHR


h2. Overview

According to the Hive Schema definition, a table's {{INPUT_FORMAT}} class can be set to NULL.  However, there are places in the code where we do not account for this NULL value, in particular the {{MetaDataFormatters}} classes {{TextMetaDataFormatter}} and {{JsonMetaDataFormatter}}.  In addition, there is no debug level logging in the {{MetaDataFormatters}} classes to tell me which table in particular is causing the problem.

{code:sql|title=hive-schema-2.2.0.mysql.sql}
CREATE TABLE IF NOT EXISTS `SDS` (
  `SD_ID` bigint(20) NOT NULL,
  `CD_ID` bigint(20) DEFAULT NULL,
  `INPUT_FORMAT` varchar(4000) CHARACTER SET latin1 COLLATE latin1_bin DEFAULT NULL,
  `IS_COMPRESSED` bit(1) NOT NULL,
...
{code}

{code:java|title=TextMetaDataFormatter.java}
// Not checking for a null return from getInputFormatClass
inputFormattCls = par.getInputFormatClass().getName();
outputFormattCls = par.getOutputFormatClass().getName();
{code}

h2. Reproduction

{code:sql}
-- MySQL Backend
update SDS SET INPUT_FORMAT=NULL WHERE SD_ID=XXX;
{code}

{code}
// Hive
SHOW TABLE EXTENDED FROM default LIKE '*';

// HS2 Logs
[HiveServer2-Background-Pool: Thread-464]: Error running hive query: 
org.apache.hive.service.cli.HiveSQLException: Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Exception while processing show table status
	at org.apache.hive.service.cli.operation.Operation.toSQLException(Operation.java:400)
	at org.apache.hive.service.cli.operation.SQLOperation.runQuery(SQLOperation.java:238)
	at org.apache.hive.service.cli.operation.SQLOperation.access$300(SQLOperation.java:89)
	at org.apache.hive.service.cli.operation.SQLOperation$3$1.run(SQLOperation.java:301)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1920)
	at org.apache.hive.service.cli.operation.SQLOperation$3.run(SQLOperation.java:314)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Exception while processing show table status
	at org.apache.hadoop.hive.ql.exec.DDLTask.showTableStatus(DDLTask.java:3025)
	at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:405)
	at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:214)
	at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:99)
	at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:2052)
	at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1748)
	at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1501)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1285)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1280)
	at org.apache.hive.service.cli.operation.SQLOperation.runQuery(SQLOperation.java:236)
	... 11 more
Caused by: java.lang.NullPointerException
	at org.apache.hadoop.hive.ql.metadata.formatting.TextMetaDataFormatter.showTableStatus(TextMetaDataFormatter.java:202)
	at org.apache.hadoop.hive.ql.exec.DDLTask.showTableStatus(DDLTask.java:3020)
	... 20 more
{code}



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