When an Exception happens when reading a JSON Record file, a NullPointerException is propagated instead

The underlying Exception that caused the JSON parsing to fail is obfuscating by this exception. We need to wrap an

Got exception to kick off standalone data ingestion job -
java.lang.NullPointerException: null
at org.apache.pinot.plugin.inputformat.json.JSONRecordReader.init(JSONRecordReader.java:56) ~[pinot-json-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.plugin.inputformat.json.JSONRecordReader.init(JSONRecordReader.java:67) ~[pinot-json-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.plugin.ingestion.batch.common.SegmentGenerationTaskRunner.run(SegmentGenerationTaskRunner.java:88) ~[pinot-batch-ingestion-hadoop-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.plugin.ingestion.batch.standalone.SegmentGenerationJobRunner.run(SegmentGenerationJobRunner.java:190) ~[pinot-batch-ingestion-standalone-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.spi.ingestion.batch.IngestionJobLauncher.kickoffIngestionJob(IngestionJobLauncher.java:96) ~[pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.spi.ingestion.batch.IngestionJobLauncher.runIngestionJob(IngestionJobLauncher.java:77) ~[pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.spi.ingestion.batch.IngestionJobLauncher.main(IngestionJobLauncher.java:55) ~[pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.tools.admin.command.LaunchDataIngestionJobCommand.execute(LaunchDataIngestionJobCommand.java:50) [pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.tools.admin.PinotAdministrator.execute(PinotAdministrator.java:152) [pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.tools.admin.PinotAdministrator.main(PinotAdministrator.java:164) [pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
Exception caught:
java.lang.NullPointerException: null
at org.apache.pinot.plugin.inputformat.json.JSONRecordReader.init(JSONRecordReader.java:56) ~[pinot-json-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.plugin.inputformat.json.JSONRecordReader.init(JSONRecordReader.java:67) ~[pinot-json-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.plugin.ingestion.batch.common.SegmentGenerationTaskRunner.run(SegmentGenerationTaskRunner.java:88) ~[pinot-batch-ingestion-hadoop-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.plugin.ingestion.batch.standalone.SegmentGenerationJobRunner.run(SegmentGenerationJobRunner.java:190) ~[pinot-batch-ingestion-standalone-0.3.0-SNAPSHOT-shaded.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.spi.ingestion.batch.IngestionJobLauncher.kickoffIngestionJob(IngestionJobLauncher.java:96) ~[pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.spi.ingestion.batch.IngestionJobLauncher.runIngestionJob(IngestionJobLauncher.java:77) ~[pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.spi.ingestion.batch.IngestionJobLauncher.main(IngestionJobLauncher.java:55) ~[pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.tools.admin.command.LaunchDataIngestionJobCommand.execute(LaunchDataIngestionJobCommand.java:50) ~[pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.tools.admin.PinotAdministrator.execute(PinotAdministrator.java:152) [pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]
at org.apache.pinot.tools.admin.PinotAdministrator.main(PinotAdministrator.java:164) [pinot-all-0.3.0-SNAPSHOT-jar-with-dependencies.jar:0.3.0-SNAPSHOT-565374bbabd1b359f8d4f8d85d62ffd0f3d27458]

Start in JSONRecordReader.init at lines 56 and 67, then trace how the JSON parsing failure is handled during standalone ingestion. Reproduce the issue with malformed JSON and verify that the resulting error preserves the underlying parsing exception instead of propagating only a NullPointerException.

Written by the indexing model from the issue text.