NPE on DefaultApplications.getEnvironments

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#1,165 opened on Aug 30, 2022 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 35/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: java
Domain: backend

Research direction

Start in ApplicationEnvironments.java at Builder.putAllUserProvided and userProvided, then trace the conversion from DefaultApplications.toApplicationEnvironments and getEnvironments at the reported lines. Reproduce the case with an application that has no user-provided environment variables; done means getEnvironments completes without a NullPointerException.

Written by the indexing model from the issue text.

Description

triaged

Hi,

I got a NullPointerException when using DefaultApplications.getEnvironments:

Exception in thread "main" java.lang.NullPointerException
	at org.cloudfoundry.operations.applications.ApplicationEnvironments$Builder.putAllUserProvided(ApplicationEnvironments.java:346)
	Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Assembly trace from producer [reactor.core.publisher.MonoMapFuseable] :
	reactor.core.publisher.Mono.checkpoint(Mono.java:1902)
	org.cloudfoundry.operations.applications.DefaultApplications.getEnvironments(DefaultApplications.java:300)
Error has been observed at the following site(s):
	|_ Mono.checkpoint ⇢ at org.cloudfoundry.operations.applications.DefaultApplications.getEnvironments(DefaultApplications.java:300)
Stack trace:
		at org.cloudfoundry.operations.applications.ApplicationEnvironments$Builder.putAllUserProvided(ApplicationEnvironments.java:346)
		at org.cloudfoundry.operations.applications.ApplicationEnvironments$Builder.userProvided(ApplicationEnvironments.java:337)
		at org.cloudfoundry.operations.applications.DefaultApplications.toApplicationEnvironments(DefaultApplications.java:1763)
		at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:113)
		at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1789)
		at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249)
		at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1789)
		at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249)
		at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1789)
		at reactor.core.publisher.MonoSingle$SingleSubscriber.onComplete(MonoSingle.java:185)
		at reactor.core.publisher.FluxFlatMap$FlatMapMain.checkTerminated(FluxFlatMap.java:845)
		at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:607)
		at reactor.core.publisher.FluxFlatMap$FlatMapMain.innerComplete(FluxFlatMap.java:916)
		at reactor.core.publisher.FluxFlatMap$FlatMapInner.onComplete(FluxFlatMap.java:1020)
		at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142)
		at reactor.core.publisher.FluxHandle$HandleSubscriber.onComplete(FluxHandle.java:212)
		at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onComplete(FluxMap.java:269)
		at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onComplete(FluxDoFinally.java:145)
		at reactor.core.publisher.FluxHandleFuseable$HandleFuseableSubscriber.onComplete(FluxHandleFuseable.java:229)
		at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onComplete(FluxContextWrite.java:126)
		at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1790)
		at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:128)
		at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:259)
		at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142)
		at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onComplete(FluxDoFinally.java:145)
		at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142)
		at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:389)
		at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:396)
		at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:452)
		at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:664)
		at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:94)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
		at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
		at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
		at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
		at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
		at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
		at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:271)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
		at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1533)
		at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1282)
		at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1329)
		at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:508)
		at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:447)
		at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
		at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
		at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
		at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
		at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
		at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
		at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
		at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
		at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
		at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
		at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
		at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
		at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
		at java.base/java.lang.Thread.run(Thread.java:834)

It seems to happen on an application without user provided environment variables.

Dominant language: Java
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