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ByteBuf.release() was not called before it's garbage-collected

See original GitHub issue

Micrometer version: 1.1.2

Publishing metrics with statsD micrometer occasionally throws the following exception:

i.m.s.i.n.u.ResourceLeakDetector: LEAK: ByteBuf.release() was not called before it's garbage-collected. See https://netty.io/wiki/reference-counted-objects.html for more information.
Recent access records: 
Created at:
    io.micrometer.shaded.io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:349)
    io.micrometer.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
    io.micrometer.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:173)
    io.micrometer.shaded.io.netty.buffer.AbstractByteBufAllocator.buffer(AbstractByteBufAllocator.java:107)
    io.micrometer.shaded.reactor.netty.NettyOutbound.lambda$sendString$5(NettyOutbound.java:300)
    io.micrometer.shaded.reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:100)
    io.micrometer.shaded.reactor.core.publisher.FluxOnBackpressureLatest$LatestSubscriber.drain(FluxOnBackpressureLatest.java:176)
    io.micrometer.shaded.reactor.core.publisher.FluxOnBackpressureLatest$LatestSubscriber.onNext(FluxOnBackpressureLatest.java:127)
    io.micrometer.shaded.reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114)
    io.micrometer.shaded.reactor.core.publisher.FluxBufferPredicate$BufferPredicateSubscriber.onNextNewBuffer(FluxBufferPredicate.java:277)
    io.micrometer.shaded.reactor.core.publisher.FluxBufferPredicate$BufferPredicateSubscriber.tryOnNext(FluxBufferPredicate.java:224)
    io.micrometer.shaded.reactor.core.publisher.FluxBufferPredicate$BufferPredicateSubscriber.onNext(FluxBufferPredicate.java:194)
    io.micrometer.shaded.reactor.core.publisher.FluxFlatMap$FlatMapMain.tryEmit(FluxFlatMap.java:530)
    io.micrometer.shaded.reactor.core.publisher.FluxFlatMap$FlatMapInner.onNext(FluxFlatMap.java:972)
    io.micrometer.shaded.reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192)
    io.micrometer.shaded.reactor.core.publisher.DirectProcessor$DirectInner.onNext(DirectProcessor.java:333)
    io.micrometer.shaded.reactor.core.publisher.DirectProcessor.onNext(DirectProcessor.java:142)
    io.micrometer.shaded.reactor.core.publisher.FluxCreate$IgnoreSink.next(FluxCreate.java:618)
    io.micrometer.shaded.reactor.core.publisher.FluxCreate$SerializedSink.next(FluxCreate.java:153)
    io.micrometer.statsd.StatsdDistributionSummary.recordNonNegative(StatsdDistributionSummary.java:52)
    io.micrometer.core.instrument.AbstractDistributionSummary.record(AbstractDistributionSummary.java:49)
    io.micrometer.core.instrument.composite.CompositeDistributionSummary.lambda$record$0(CompositeDistributionSummary.java:38)
    java.base/java.lang.Iterable.forEach(Iterable.java:75)
    io.micrometer.core.instrument.composite.AbstractCompositeMeter.forEachChild(AbstractCompositeMeter.java:47)
    io.micrometer.core.instrument.composite.CompositeDistributionSummary.record(CompositeDistributionSummary.java:38)

Issue Analytics

State:
Created 3 years ago
Reactions:6
Comments:23 (5 by maintainers)

Top GitHub Comments

1reaction

kdamevincommented, Jul 24, 2020

Getting the issue as well with micrometer 1.5.2. However we encountered another issue in 1.5.1 with duplicate metrics being sent (https://github.com/micrometer-metrics/micrometer/issues/2138) so not easy for us to downgrade. Not sure what’s better 😓

1reaction

cicilthomascommented, Jun 22, 2020

Started experiencing the same issue after upgrading to springboot 2.3.1.RELEASE and micrometer 1.5.1 @shakuzen for me this can be reproduced by just running the springboot app and doing nothing. This error will be thrown after sometime (˜10-15 mins)