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Fix flaky ReactiveWebServerLoadBalancerInteropTest #5999

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Fix flaky ReactiveWebServerLoadBalancerInteropTest #5999

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ikhoon
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@ikhoon ikhoon commented Nov 22, 2024

Motivation:

com.linecorp.armeria.spring.web.reactive.ReactiveWebServerLoadBalancerInteropTest.[1] sessionProtocol=H1C, path=/controller/api/ping
java.util.ConcurrentModificationException
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1714)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at com.linecorp.armeria.spring.web.reactive.ReactiveWebServerLoadBalancerInteropTest.assertNoErrorLogByHttpWebHandlerAdapter(ReactiveWebServerLoadBalancerInteropTest.java:148)

It seems that logAppender.list was modified while retrieving elements

Modifications:

  • Use CopyOnWriteArrayList to collect ILoggingEvent

Result:

Fixes #5462

@ikhoon
Fix flaky ReactiveWebServerLoadBalancerInteropTest
09dfc0f 
Motivation:

```
com.linecorp.armeria.spring.web.reactive.ReactiveWebServerLoadBalancerInteropTest.[1] sessionProtocol=H1C, path=/controller/api/ping
java.util.ConcurrentModificationException
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1714)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
	at com.linecorp.armeria.spring.web.reactive.ReactiveWebServerLoadBalancerInteropTest.assertNoErrorLogByHttpWebHandlerAdapter(ReactiveWebServerLoadBalancerInteropTest.java:148)
```

It seems that `logAppender.list` was modified while retrieving elements

Modifications:

- Use `CopyOnWriteArrayList` to collect `ILoggingEvent`

Result:

Fixes line#5462
@ikhoon ikhoon added the cleanup label Nov 22, 2024
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🔍 Build Scan® (commit: 40a3b7d)

Job name Status Build Scan®
build-ubicloud-standard-8-jdk-8 ✅ https://ge.armeria.dev/s/vxekilo5oq37a
build-ubicloud-standard-8-jdk-21-snapshot-blockhound ✅ https://ge.armeria.dev/s/maauyjb3etsec
build-ubicloud-standard-8-jdk-17-min-java-17-coverage ✅ https://ge.armeria.dev/s/dqijei7d2sdgi
build-ubicloud-standard-8-jdk-17-min-java-11 ✅ https://ge.armeria.dev/s/flzkfwkujbq2w
build-ubicloud-standard-8-jdk-17-leak ✅ https://ge.armeria.dev/s/gkao3afsi7kte
build-ubicloud-standard-8-jdk-11 ✅ https://ge.armeria.dev/s/std2afxijp4qe
build-macos-12-jdk-21 ✅ https://ge.armeria.dev/s/35ohlwfqyl2ji

minwoox
minwoox approved these changes Nov 22, 2024
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@minwoox minwoox minwoox approved these changes

@jrhee17 jrhee17 jrhee17 approved these changes

@trustin trustin Awaiting requested review from trustin trustin is a code owner

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Test failure: com.linecorp.armeria.spring.web.reactive.ReactiveWebServerLoadBalancerInteropTest
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@ikhoon @jrhee17 @minwoox