GitHub user zhangminglei opened a pull request:
https://github.com/apache/flink/pull/6335
[FLINK-9675] [fs] Avoid FileInputStream/FileOutputStream
## What is the purpose of the change
Avoid using FileInputStream/FileOutputStream because they rely on
finalizers (before Java 11), which create unnecessary GC load. The
alternatives, Files.newInputStream, are as easy to use and don't have this
issue.
## Brief change log
On the code path, the ```FileInputStream``` used by the test classes has
not been modified to maintain the original appearance.
This is the first commit of this PR.
## 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): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (yes)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (don't know)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not documented)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zhangminglei/flink flink-9675-fisfos
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/6335.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #6335
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commit fe7c90bc3165722ef4e1289ac809fa92c8e3a08d
Author: zhangminglei <zml13856086071@...>
Date: 2018-07-15T02:21:45Z
[FLINK-9675] [fs] Avoid FileInputStream/FileOutputStream
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