[FLINK-30203] BatchPandasConversionTests.test_empty_to_pandas failed

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.16.0, 1.15.3
• Component/s: API / Python
• Labels: test-stability
• Assignee: Unassigned
• Reporter: Matthias Pohl
• Created: 25/Nov/22 08:06
• Updated: 25/Nov/22 08:18

Description

This build failed (not exclusively) because of BatchPandasConversionTests.test_empty_to_pandas. Looks like it's caused by a NullPointerException:

Nov 25 02:08:35 E                   py4j.protocol.Py4JJavaError: An error occurred while calling z:org.apache.flink.table.runtime.arrow.ArrowUtils.collectAsPandasDataFrame.
Nov 25 02:08:35 E                   : java.lang.NullPointerException
Nov 25 02:08:35 E                   	at java.util.Objects.requireNonNull(Objects.java:203)
Nov 25 02:08:35 E                   	at org.apache.calcite.rel.metadata.RelMetadataQuery.<init>(RelMetadataQuery.java:144)
Nov 25 02:08:35 E                   	at org.apache.calcite.rel.metadata.RelMetadataQuery.<init>(RelMetadataQuery.java:108)
Nov 25 02:08:35 E                   	at org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery.<init>(FlinkRelMetadataQuery.java:78)
Nov 25 02:08:35 E                   	at org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery.instance(FlinkRelMetadataQuery.java:59)
Nov 25 02:08:35 E                   	at org.apache.flink.table.planner.calcite.FlinkRelOptClusterFactory$$anon$1.get(FlinkRelOptClusterFactory.scala:39)
Nov 25 02:08:35 E                   	at org.apache.flink.table.planner.calcite.FlinkRelOptClusterFactory$$anon$1.get(FlinkRelOptClusterFactory.scala:38)
Nov 25 02:08:35 E                   	at org.apache.calcite.plan.RelOptCluster.getMetadataQuery(RelOptCluster.java:178)
Nov 25 02:08:35 E                   	at org.apache.calcite.rel.logical.LogicalFilter.create(LogicalFilter.java:127)
[...]