[jira] [Created] (FLINK-19771) NullPointerException when accessing null array from postgres in JDBC Connector

["Dylan Forciea (Jira)" <ji...@apache.org>]

Dylan Forciea created FLINK-19771:
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             Summary: NullPointerException when accessing null array from postgres in JDBC Connector
                 Key: FLINK-19771
                 URL: https://issues.apache.org/jira/browse/FLINK-19771
             Project: Flink
          Issue Type: Bug
          Components: Connectors / JDBC
    Affects Versions: 1.11.2
            Reporter: Dylan Forciea


When trying to utilize the JDBC Connector for Postgres, I tried to read in a text array. When a row that was null was attempted to be read in, the connector threw an exception and execution stopped. It appears looking at the source code that if the row is null that it will still attempt to grab the contents out: https://github.com/apache/flink/blob/release-1.11.2/flink-connectors/flink-connector-jdbc/src/main/java/org/apache/flink/connector/jdbc/internal/converter/PostgresRowConverter.java#L97

The stack trace is as follows:
{code:java}
[error] Caused by: java.io.IOException: Couldn't access resultSet[error]   at org.apache.flink.connector.jdbc.table.JdbcRowDataInputFormat.nextRecord(JdbcRowDataInputFormat.java:266)[error]   at org.apache.flink.connector.jdbc.table.JdbcRowDataInputFormat.nextRecord(JdbcRowDataInputFormat.java:57)[error]   at org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:91)[error]   at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)[error]   at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)[error]   at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:213)[error] Caused by: java.lang.NullPointerException[error]   at org.apache.flink.connector.jdbc.internal.converter.PostgresRowConverter.lambda$createPostgresArrayConverter$c06ce9f4$2(PostgresRowConverter.java:97)[error]   at org.apache.flink.connector.jdbc.internal.converter.AbstractJdbcRowConverter.toInternal(AbstractJdbcRowConverter.java:79)[error]   at org.apache.flink.connector.jdbc.table.JdbcRowDataInputFormat.nextRecord(JdbcRowDataInputFormat.java:259)[error]   ... 5 more {code}



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