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https://issues.apache.org/jira/browse/FLINK-1555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14333333#comment-14333333
]
ASF GitHub Bot commented on FLINK-1555:
---------------------------------------
Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/415#discussion_r25165611
--- Diff:
flink-core/src/main/java/org/apache/flink/api/common/typeutils/CompositeType.java
---
@@ -132,7 +133,31 @@ public CompositeType(Class<T> typeClass) {
}
return getNewComparator(config);
}
-
+
+ //
--------------------------------------------------------------------------------------------
+
+ /**
+ * Debugging utility to understand the hierarchy of serializers created
by the Java API.
+ */
+ public static <T> String getSerializerTree(TypeInformation<T> ti) {
+ return getSerializerTree(ti, 0);
+ }
+
+ private static <T> String getSerializerTree(TypeInformation<T> ti, int
indent) {
+ String ret = "";
+ if(ti instanceof CompositeType) {
+ ret += ti.toString()+"\n";
--- End diff --
I agree.
I'll also update the PR to list the field types of GenericTypes as well.
> Add utility to log the serializers of composite types
> -----------------------------------------------------
>
> Key: FLINK-1555
> URL: https://issues.apache.org/jira/browse/FLINK-1555
> Project: Flink
> Issue Type: Improvement
> Reporter: Robert Metzger
> Assignee: Robert Metzger
> Priority: Minor
>
> Users affected by poor performance might want to understand how Flink is
> serializing their data.
> Therefore, it would be cool to have a tool utility which logs the serializers
> like this:
> {{SerializerUtils.getSerializers(TypeInformation<POJO> t);}}
> to get
> {code}
> PojoSerializer
> TupleSerializer
> IntSer
> DateSer
> GenericTypeSer(java.sql.Date)
> PojoSerializer
> GenericTypeSer(HashMap)
> {code}
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