Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6272
Thanks for the review, merging...
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6115
Thanks for the review, merging...
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6272
rebased to solve the merge conflict (auto-solved by git though)
---
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6355#discussion_r203652882
--- Diff: docs/ops/security-ssl.md ---
@@ -33,6 +33,9 @@ SSL can be enabled for all network communication between
Flink components. SSL k
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6355#discussion_r203617345
--- Diff:
flink-core/src/main/java/org/apache/flink/configuration/SecurityOptions.java ---
@@ -160,4 +160,41 @@
key("security.ssl.v
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6363#discussion_r203432013
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/netty/NettyLeakDetectionResource.java
---
@@ -0,0 +1,84 @@
+/*
+ * Licensed
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6355#discussion_r203405530
--- Diff:
flink-core/src/main/java/org/apache/flink/configuration/SecurityOptions.java ---
@@ -160,4 +160,41 @@
key("security.ssl.v
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6363#discussion_r203398509
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/rest/FileUploadHandlerTest.java
---
@@ -50,6 +55,24 @@
private static final
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6363
[FLINK-9860][REST] fix buffer leak in FileUploadHandler
## What is the purpose of the change
The current implementation of `FileUploadHandler` has two cases where the
given message
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6355
about the travis error: I tried regenerating the configuration page from
the sources but it does not change at all and the "documentation outdated"
remains :(
---
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6355
[FLINK-9878][network][ssl] add more low-level ssl options
## What is the purpose of the change
This is mostly to tackle bugs like https://github.com/netty/netty/issues/832
(JDK issue
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6294#discussion_r202720265
--- Diff:
flink-yarn/src/main/java/org/apache/flink/yarn/configuration/YarnConfigOptions.java
---
@@ -65,7 +65,11 @@
key
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6294#discussion_r202720821
--- Diff: docs/ops/deployment/yarn_setup.md ---
@@ -132,7 +132,7 @@ Stop the YARN session by stopping the unix process
(using CTRL+C) or by entering
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6294#discussion_r202719580
--- Diff:
flink-yarn/src/main/java/org/apache/flink/yarn/configuration/YarnConfigOptions.java
---
@@ -65,7 +65,11 @@
key
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6294#discussion_r202722162
--- Diff: docs/ops/deployment/yarn_setup.md ---
@@ -132,7 +132,7 @@ Stop the YARN session by stopping the unix process
(using CTRL+C) or by entering
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6340#discussion_r202653111
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/rest/handler/job/JobSubmitHandlerTest.java
---
@@ -57,24 +60,39 @@
/**
* Tests
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6327
Thanks for the review @zentol.
Yes, this PR will fail until #6340 is merged.
Regarding the warning: I did not want to bother with different formats
here, but you're right: a follow-up PR
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6327#discussion_r202650892
--- Diff: flink-end-to-end-tests/test-scripts/common.sh ---
@@ -148,6 +151,41 @@ function create_ha_config() {
EOL
}
+function set_conf_ssl
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6327#discussion_r202650635
--- Diff: flink-end-to-end-tests/test-scripts/common.sh ---
@@ -183,9 +221,15 @@ function start_cluster {
"$FLINK_DIR"/bin/start-
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6327
Rebased and enabled SSL only for already existing e2e tests - since the old
configuration values for enabling SSL communication for all components
`security.ssl.enabled` was retained though, #6326 did
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6326
Can you also update `ops/security-ssl.md` with the updated configuration?
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6327
Thanks, I'll have a second look at this PR once I can actually test it :)
(maybe enabling SSL for the `test_streaming_kafka010.sh` test or so)
---
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6328
[FLINK-9816][network] add option to configure SSL engine provider for TM
communication
## What is the purpose of the change
Netty has the ability to run with different `SSLEngine
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6327
[FLINK-9839][e2e] add a streaming allround test with SSL enabled
## What is the purpose of the change
Currently, there's no simple streaming job test like the
`test_batch_allround.sh
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r202066470
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -101,23 +111,210 @@ allows to [import Maven
projects](http://books.sonatype.com/m2eclipse-book/refer
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6291
merging...
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6271
merging...
---
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6272#discussion_r201971896
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
---
@@ -360,32 +360,44 @@ public boolean
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6272#discussion_r201970654
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
---
@@ -360,32 +360,44 @@ public boolean
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6272#discussion_r201969455
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/buffer/LocalBufferPool.java
---
@@ -277,37 +277,17 @@ public void recycle
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r201965094
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -101,23 +111,210 @@ allows to [import Maven
projects](http://books.sonatype.com/m2eclipse-book/refer
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5381
@zhijiangW is this PR still useful? if so, was there any progress?
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6291
@yanghua sure, why not ... although there's no performance problem in
string concatenation for exceptions - we'll abort anyway
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6115
alright - tried that change which also has the advantage of not using up
memory for the `templateKey` - these are the results from the same Benchmark
(same hardware, new software though, so I also re
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6272
actually, I forgot to adapt the unit test which relied on the previous
order of the calls and assumed that the buffer got recycled. With the changes
from the fixup, the buffer is not recycled
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5900
Hi @twalthr,
I just created a fixup commit for this PR and the one for `flink-web`. Can
you have a second look?
---
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r201310579
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r201286036
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6254#discussion_r201273133
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
---
@@ -479,6 +508,9 @@ void
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6254#discussion_r201272052
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
---
@@ -594,22 +626,22 @@ public String
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6272
thanks for the review - I changed the code as requested
---
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6272#discussion_r201260221
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/RemoteInputChannel.java
---
@@ -360,32 +360,45 @@ public boolean
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6291
[FLINK-9785][network] add remote address information to
LocalTransportException instances
## What is the purpose of the change
In contrast to the messages inside `RemoteTransportException`s
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6272
[FLINK-9755][network] forward exceptions in
RemoteInputChannel#notifyBufferAvailable() to the responsible thread
## What is the purpose of the change
Exceptions in `RemoteInputChannel
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6271
[FLINK-9766][network][tests] fix cleanup in RemoteInputChannelTest
## What is the purpose of the change
If an assertion in the tests of `RemoteInputChannelTest` fails and as a
result
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6257#discussion_r200283214
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/buffer/LocalBufferPool.java
---
@@ -251,27 +257,56 @@ private MemorySegment
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6257#discussion_r200274433
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/buffer/LocalBufferPool.java
---
@@ -251,27 +257,56 @@ private MemorySegment
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6257#discussion_r200274038
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/buffer/LocalBufferPool.java
---
@@ -251,27 +257,56 @@ private MemorySegment
Github user NicoK closed the pull request at:
https://github.com/apache/flink/pull/6254
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6254
I updated the commit with a fixed unit test and added a big TODO on what
else would need to be adapted in order to go with this solution (no updated
commit message yet).
Since this is even
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6257
[FLINK-9676][network] clarify contracts of
BufferListener#notifyBufferAvailable() and fix a deadlock
## What is the purpose of the change
When recycling exclusive buffers
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6254
[FLINK-9676][network] clarify contracts of
BufferListener#notifyBufferAvailable() and fix a deadlock
## What is the purpose of the change
When recycling exclusive buffers
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6238
actually, it was quite easy to reproduce and the fix was also just as you
proposed - please see the new commits (the old one was only renamed since I
created a separate issue for that now)
---
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/6238#discussion_r199702444
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/buffer/NetworkBufferPool.java
---
@@ -147,7 +151,12 @@ public void recycle
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6238
[FLINK-9636][network] fix inconsistency with failed buffer redistribution
## What is the purpose of the change
If an exception is thrown in `NetworkBufferPool#requestMemorySegments()`'s
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5900
Thanks for the review, Timo.
Regarding the copy of the gradle build file: since we did not really have a
pristine version (only one that is generated by the shell script) I wanted to
put one
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r194902416
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r194902217
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r194901682
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r194901455
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r194900846
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5900#discussion_r194900211
--- Diff: docs/quickstart/java_api_quickstart.md ---
@@ -108,16 +118,201 @@ In Eclipse, choose
box: `-Xmx800m`.
In IntelliJ IDEA recommended way
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6115
[FLINK-9435][java] Remove per-key selection Tuple instantiation via
reflection in ComparableKeySelector and ArrayKeySelector
## What is the purpose of the change
Inside `KeySelectorUtil
Github user NicoK closed the pull request at:
https://github.com/apache/flink/pull/6064
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/6064
apparently, `flink-json` and `flink-avro` should not even be in `opt/` -
closing this PR
---
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/6064
[FLINK-9409][mvn] add missing assembly dependencies to flink-dist/pomâ¦
## What is the purpose of the change
Building Flink via `mvn clean install -pl flink-dist -am` currently fails
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5923
Apparently, there's a problem with unknown input channels that surfaced
with the newly-merged extra tests: they don't get exclusive buffers (naturally)
but the floating buffers are calculated
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5923
Honestly, I did not find the proposed change too convincing either due to
the additional branch into bounded vs. unbounded partitions which caused the
variable names to be wrong in the unbounded case
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5963
[FLINK-9305][s3] also register flink-s3-fs-hadoop's factory for the s3a://
scheme
## What is the purpose of the change
For enhanced user experience, we should also register our Hadoop S3A
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5900
I'm pretty sure I got all this covered by using a separate "configuration":
`myShadowJar` - not the standard dependency configuration*, but does the trick:
Everything added to `myShadowJ
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5943
[FLINK-9275][streaming] add taskName to the output flusher thread's name
## What is the purpose of the change
All output flusher threads are named "OutputFlusher" while at the o
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5942
[FLINK-9274][kafka] add thread name for partition discovery
## What is the purpose of the change
For debugging, threads should have names to filter on and get a quick
overview. The Kafka
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5923
[FLINK-9253][network] make the maximum floating buffers count channel-type
independent
## What is the purpose of the change
The credit-based flow control path assigns exclusive buffers only
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5915
true, `points.rebalance()` is redundant, thanks for having a look, I
created a follow-up fix in #5916
---
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5916
[hotfix][tests] remove redundant rebalance in
SuccessAfterNetworkBuffersFailureITCase
This removes a redundant `rebalance()` operation introduced by #5915.
You can merge this pull request into a Git
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5915
[FLINK-9243][tests] fix flaky SuccessAfterNetworkBuffersFailureITCase
this adds some `rebalance()` operations into
`SuccessAfterNetworkBuffersFailureITCase#runKMeans` which should be set up to
fail
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5914
[FLINK-9256][network] fix NPE in SingleInputGate#updateInputChannel() for
non-credit based flow control
## What is the purpose of the change
`SingleInputGate#updateInputChannel()` fails
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5900
[FLINK-9222][docs] add documentation for setting up Gradle projects
## What is the purpose of the change
Together with https://github.com/apache/flink-web/pull/105, this will add a
project
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5870#discussion_r182699788
--- Diff:
flink-tests/src/test/java/org/apache/flink/test/runtime/NetworkStackThroughputITCase.java
---
@@ -327,7 +335,8 @@ private JobGraph createJobGraph
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5870#discussion_r182668925
--- Diff:
flink-tests/src/test/java/org/apache/flink/test/runtime/NetworkStackThroughputITCase.java
---
@@ -234,43 +232,51 @@ public void testThroughput
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5874
[FLINK-9076][network] reduce minimum number of floating buffers to 0
## What is the purpose of the change
Currently, floating buffers (per gate) are always required in case
credit-based flow
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5872#discussion_r182478661
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java
---
@@ -857,7 +859,7 @@ public void run
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5872
alright...there you go
---
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5873
[FLINK-9208][tests] fix naming of StreamNetworkThroughputBenchmarkTest
This PR fixes the naming of `StreamNetworkThroughputBenchmarkTest` so that
it gets included in the maven tests.
You can merge
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5872#discussion_r182455513
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java
---
@@ -857,7 +859,7 @@ public void run
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5872#discussion_r182455202
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/CheckpointCoordinator.java
---
@@ -1214,7 +1216,7 @@ public void run
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5872
[FLINK-9206][checkpoints] add job IDs to CheckpointCoordinator log messages
## What is the purpose of the change
The `CheckpointCoordinator` exists per job but its log messages (all
bundled
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5842
[FLINK-9144][network] fix SpillableSubpartition causing jobs to hang when
spilling
## What is the purpose of the change
This should fix various scenarios where the backlog accounting
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5841
[FLINK-9163[e2e-tests] harden signal traps and config restoration
## What is the purpose of the change
Signal traps on certain systems, e.g. Linux, may be called concurrently
when the trap
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5672
ok, after fixing one typo, this should pass Travis now
---
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5802#discussion_r179453256
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordWriterTest.java
---
@@ -309,8 +309,6 @@ public void
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5802#discussion_r179451610
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/api/writer/RecordWriter.java
---
@@ -164,7 +164,7 @@ public BufferConsumer
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5672
I reworked the code as desired, i.e. adding `-yd` and `--yarndetached` as
deprecated parameters to `CliFrontendParser` and adapting `ProgramOptions` and
`FlinkYarnSessionCli` accordingly.
---
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5672#discussion_r178804566
--- Diff: flink-yarn/pom.xml ---
@@ -326,6 +334,62 @@ under the License
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5790
thanks - fixed and extended with an example for "schedule with the next
watermark" for event-time timers
---
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5790
Actually, more advanced schemes using `current watermark + 1` (which fires
with the next watermark) for the event time timer should also go into the
documentation. I'll extend the PR ...
---
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5790
[FLINK-9107][docs] document timer coalescing for ProcessFunction
## What is the purpose of the change
In a ProcessFunction, registering timers for each event via
`ctx.timerService
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5695#discussion_r178069787
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/PartialConsumePipelinedResultTest.java
---
@@ -32,41 +31,51
GitHub user NicoK opened a pull request:
https://github.com/apache/flink/pull/5788
[FLINK-9110][docs] fix local bundler installation
## What is the purpose of the change
The fallback to installing `bundler` locally within `docs/build_docs.sh`
did not work for several
Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/5624
Indeed, Presto-S3 does better in
`com.facebook.presto.hive.PrestoS3FileSystem#create()`:
```
if ((!overwrite) && exists(path)) {
throw new IOException("File already ex
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