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https://issues.apache.org/jira/browse/FLINK-2637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14768943#comment-14768943
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ASF GitHub Bot commented on FLINK-2637:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1134#discussion_r39630227
--- Diff:
flink-scala/src/main/scala/org/apache/flink/api/scala/typeutils/OptionSerializer.scala
---
@@ -20,6 +20,8 @@ package org.apache.flink.api.scala.typeutils
import org.apache.flink.api.common.typeutils.TypeSerializer
import org.apache.flink.core.memory.{DataOutputView, DataInputView}
+import scala.xml.dtd.ContentModel._labelT
--- End diff --
?
> Add abstract equals, hashCode and toString methods to TypeInformation
> ---------------------------------------------------------------------
>
> Key: FLINK-2637
> URL: https://issues.apache.org/jira/browse/FLINK-2637
> Project: Flink
> Issue Type: Improvement
> Components: Core
> Affects Versions: 0.9, 0.10
> Reporter: Fabian Hueske
> Assignee: Till Rohrmann
> Labels: starter
> Fix For: 0.10
>
>
> Flink expects that implementations of {{TypeInformation}} have valid
> implementations of {{hashCode}} and {{equals}}. However, the API does not
> enforce to implement these methods. Hence, this is a common origin for bugs
> such as for example FLINK-2633.
> This can be avoided by adding abstract {{hashCode}} and {{equals}} methods to
> TypeInformation. An abstract {{toString}} method could also be added.
> This change will brake the API and require to fix a couple of broken
> {{TypeInformation}} implementations.
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