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https://issues.apache.org/jira/browse/FLINK-2292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14626054#comment-14626054
]
ASF GitHub Bot commented on FLINK-2292:
---------------------------------------
Github user mxm commented on a diff in the pull request:
https://github.com/apache/flink/pull/896#discussion_r34547975
--- Diff: flink-java/src/main/java/org/apache/flink/api/java/DataSet.java
---
@@ -408,14 +408,16 @@ public long count() throws Exception {
JobExecutionResult res = getExecutionEnvironment().execute();
ArrayList<byte[]> accResult = res.getAccumulatorResult(id);
- try {
- return
SerializedListAccumulator.deserializeList(accResult, serializer);
- }
- catch (ClassNotFoundException e) {
- throw new RuntimeException("Cannot find type class of
collected data type.", e);
- }
- catch (IOException e) {
- throw new RuntimeException("Serialization error while
deserializing collected data", e);
+ if (accResult != null) {
+ try {
+ return
SerializedListAccumulator.deserializeList(accResult, serializer);
+ } catch (ClassNotFoundException e) {
+ throw new RuntimeException("Cannot find type
class of collected data type.", e);
+ } catch (IOException e) {
+ throw new RuntimeException("Serialization error
while deserializing collected data", e);
+ }
+ } else {
+ throw new RuntimeException("The job result did not
contain any accumulator data.");
--- End diff --
Then let's change it to
> Collect returned no results.
> Report accumulators periodically while job is running
> -----------------------------------------------------
>
> Key: FLINK-2292
> URL: https://issues.apache.org/jira/browse/FLINK-2292
> Project: Flink
> Issue Type: Sub-task
> Components: JobManager, TaskManager
> Reporter: Maximilian Michels
> Assignee: Maximilian Michels
> Fix For: 0.10
>
>
> Accumulators should be sent periodically, as part of the heartbeat that sends
> metrics. This allows them to be updated in real time.
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