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https://issues.apache.org/jira/browse/FLINK-18348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17139211#comment-17139211
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Piotr Nowojski edited comment on FLINK-18348 at 6/18/20, 9:03 AM:
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I think I agree with [~wind_ljy] that the place you pointed out [~zjwang] is
not affecting this bug/illegal state exception. So this is on a verge of being
release blocker.
If you can work on this [~wind_ljy] that would be great. Just please note that
we would need a fix for this very shortly. Could you also provide a unit test
for this exact scenario? For example via injecting {{ConnectionManager}} that
would throw an {{ExpectedTestException}}?
was (Author: pnowojski):
I think I agree with [~wind_ljy] that the place you pointed out [~zjwang] is
not affecting this bug/illegal state exception. So this is on a verge of being
release blocker.
If you can work on this [~wind_ljy] that would be great. Could you also provide
a unit test for this exact scenario? For example via injecting
{{ConnectionManager}} that would throw an {{ExpectedTestException}}?
> RemoteInputChannel should checkError before checking partitionRequestClient
> ---------------------------------------------------------------------------
>
> Key: FLINK-18348
> URL: https://issues.apache.org/jira/browse/FLINK-18348
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Network
> Affects Versions: 1.11.0, 1.12.0
> Reporter: Jiayi Liao
> Assignee: Jiayi Liao
> Priority: Critical
> Fix For: 1.11.0
>
>
> The error will be set and \{{partitionRequestClient}} will be a null value if
> a remote channel fails to request the partition at the beginning. And the
> task will fail
> [here|https://github.com/apache/flink/blob/2150533ac0b2a6cc00238041853bbb6ebf22cee9/flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java#L172]
> when the task thread trying to fetch data from channels.
> And then we get error:
> {code:java}
> java.lang.IllegalStateException: Queried for a buffer before requesting a
> queue.
> at
> org.apache.flink.util.Preconditions.checkState(Preconditions.java:195)
> ~[flink-dist_2.11-1.11-SNAPSHOT.jar:1.11-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.partition.consumer.RemoteInputChannel.getNextBuffer(RemoteInputChannel.java:172)
> ~[flink-dist_2.11-1.11-SNAPSHOT.jar:1.11-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate.waitAndGetNextData(SingleInputGate.java:637)
> ~[flink-dist_2.11-1.11-SNAPSHOT.jar:1.11-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate.getNextBufferOrEvent(SingleInputGate.java:615)
> ~[flink-dist_2.11-1.11-SNAPSHOT.jar:1.11-SNAPSHOT]
> at
> org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate.getNext(SingleInputGate.java:598)
> ~[flink-dist_2.11-1.11-SNAPSHOT.jar:1.11-SNAPSHOT]
> {code}
> But the root cause is the {{PartitionConnectionException}} we set when
> requesting the partition.
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