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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/05/08 05:32:10 UTC
[GitHub] [flink] wsry opened a new pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
wsry opened a new pull request #12027:
URL: https://github.com/apache/flink/pull/12027
## What is the purpose of the change
For unaligned checkpoint, when checkpointing the inflight data of incoming channel, both task thread and Netty thread may add data to the channel state writer. More specifically, the task thread will first request inflight buffers from the input channel and add the buffers to the channel state writer, and then the Netty thread will add the following up buffers (if any) to the channel state writer. The buffer adding of task thread and Netty thread is not synchronized so the Netty thread may add buffers before the task thread which leads to disorder of the data and corruption of the data stream.
This PR tries to fix the problem.
## Brief change log
- Make requesting and adding of inflight buffer of task thread happen in synchronized block to avoid race condition.
## Verifying this change
This change is already covered by existing tests.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
- Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (**yes** / no / don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not documented)
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[GitHub] [flink] pnowojski commented on a change in pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
pnowojski commented on a change in pull request #12027:
URL: https://github.com/apache/flink/pull/12027#discussion_r422484279
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
##########
@@ -216,7 +220,7 @@ void retriggerSubpartitionRequest(int subpartitionIndex) throws IOException {
}
@Override
- public List<Buffer> requestInflightBuffers(long checkpointId) throws IOException {
+ public void requestInflightBuffers(long checkpointId, ChannelStateWriter channelStateWriter) throws IOException {
Review comment:
rename all of the methods `requestInflightBuffers` -> `spillInflightBuffers`? As this method is no longer returning/requesting but spilling inflight buffers?
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[GitHub] [flink] wsry commented on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
wsry commented on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-626135939
@pnowojski Could you please also take a look at this fix?
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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* 42f0a0401969ac05f42aa592a39c2431c9f3aed4 Azure: [SUCCESS](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=798)
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[GitHub] [flink] wsry commented on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
wsry commented on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-626267286
@flinkbot run azure
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] wsry commented on a change in pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
wsry commented on a change in pull request #12027:
URL: https://github.com/apache/flink/pull/12027#discussion_r422492233
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
##########
@@ -216,7 +220,7 @@ void retriggerSubpartitionRequest(int subpartitionIndex) throws IOException {
}
@Override
- public List<Buffer> requestInflightBuffers(long checkpointId) throws IOException {
+ public void requestInflightBuffers(long checkpointId, ChannelStateWriter channelStateWriter) throws IOException {
Review comment:
Thank for the review. I have renamed the method ```requestInflightBuffers``` to ```spillInflightBuffers```.
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
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URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot commented on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
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[GitHub] [flink] pnowojski commented on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
pnowojski commented on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-626298876
Thanks @wsry merged :)
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[GitHub] [flink] flinkbot edited a comment on pull request #12027: [FLINK-17564][checkpointing] Fix buffer disorder issue of RemoteInputChannel for unaligned checkpoint
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #12027:
URL: https://github.com/apache/flink/pull/12027#issuecomment-625644178
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