# Logstash IndexOutOfBoundsException: writerIndex + minWritableBytes exceeds maxCapacity **URL:** \ **Category:** Logstash\ **Created:** [August 25, 2022, 3:37pm UTC](https://discuss.elastic.co/t/logstash-indexoutofboundsexception-writerindex-minwritablebytes-exceeds-maxcapacity/312943 "2022-08-25T15:37:17Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![cotjoey](https://avatars.discourse-cdn.com/v4/letter/c/76d3ee/32.png) [@cotjoey](https://discuss.elastic.co/u/cotjoey)\ **Post date:** [August 25, 2022, 3:37pm UTC](https://discuss.elastic.co/t/logstash-indexoutofboundsexception-writerindex-minwritablebytes-exceeds-maxcapacity/312943/1 "2022-08-25T15:37:17Z")
Hello, Lately my logstash instance has been throwing the following exceptions intermittently. I cannot find a solution anywhere. All the posts in this forum with the string "writerIndex" with similar issues are left unanswered. Here is the java stack (reverse order of time): ```auto Aug 25 12:11:29 logstash.example.com logstash[11784]: ... 9 more Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at org.logstash.beats.BeatsParser.decode(BeatsParser.java:181) ~[logstash-input-beats-6.2.3.jar:?] Aug 25 12:11:29 logstash.example.com logstash[11784]: at org.logstash.beats.BeatsParser.inflateCompressedFrame(BeatsParser.java:218) ~[logstash-input-beats-6.2.3.jar:?] Aug 25 12:11:29 logstash.example.com logstash[11784]: at org.logstash.beats.BeatsParser.decompressImpl(BeatsParser.java:231) ~[logstash-input-beats-6.2.3.jar:?] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.AbstractByteBuf.readBytes(AbstractByteBuf.java:964) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.PooledUnsafeDirectByteBuf.getBytes(PooledUnsafeDirectByteBuf.java:142) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.UnsafeByteBufUtil.getBytes(UnsafeByteBufUtil.java:602) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.UnsafeByteBufUtil.getBytes(UnsafeByteBufUtil.java:615) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at java.util.zip.InflaterOutputStream.write(InflaterOutputStream.java:255) ~[?:?] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.ByteBufOutputStream.write(ByteBufOutputStream.java:67) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1073) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.AbstractByteBuf.ensureWritable(AbstractByteBuf.java:280) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.buffer.AbstractByteBuf.ensureWritable0(AbstractByteBuf.java:294) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: Caused by: java.lang.IndexOutOfBoundsException: writerIndex(2147483267) + minWritableBytes(512) exceeds maxCapacity(2147483647): PooledUnsafeDirectByteBuf(ridx: 0, widx: 2147483267, cap: 2147483647) Aug 25 12:11:29 logstash.example.com logstash[11784]: at java.lang.Thread.run(Thread.java:829) [?:?] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) [netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.util.concurrent.DefaultEventExecutor.run(DefaultEventExecutor.java:66) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:370) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:61) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:477) ~[netty-all-4.1.65.Final.jar:4.1.65.Final] Aug 25 12:11:29 logstash.example.com logstash[11784]: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: writerIndex(2147483267) + minWritableBytes(512) exceeds maxCapacity(2147483647): PooledUnsafeDirectByteBuf(ridx: 0, widx: 2147483267, cap: 2147483647) Aug 25 12:11:29 logstash.example.com logstash[11784]: [2022-08-25T12:11:29,589][WARN][io.netty.channel.DefaultChannelPipeline][main][32670a15682f17f0b0f99dc060e96c7e2287bba72ac084e0031aa0639c2f1132] An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception. Aug 25 12:11:29 logstash.example.com logstash[11784]: [2022-08-25T12:11:29,583][INFO][org.logstash.beats.BeatsHandler][main][32670a15682f17f0b0f99dc060e96c7e2287bba72ac084e0031aa0639c2f1132] [local: 172.31.20.93:5044, remote: 167.74.98.248:51015] Handling exception: io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: writerIndex(2147483267) + minWritableBytes(512) exceeds maxCapacity(2147483647): PooledUnsafeDirectByteBuf(ridx: 0, widx: 2147483267, cap: 2147483647) (caused by: java.lang.IndexOutOfBoundsException: writerIndex(2147483267) + minWritableBytes(512) exceeds maxCapacity(2147483647): PooledUnsafeDirectByteBuf(ridx: 0, widx: 2147483267, cap: 2147483647)) Aug 25 12:02:23 logstash.example.com logstash[11784]: [2022-08-25T12:02:23,127][INFO][org.logstash.beats.Server][main][32670a15682f17f0b0f99dc060e96c7e2287bba72ac084e0031aa0639c2f1132] Starting server on port: 5044 Aug 25 12:02:23 logstash.example.com logstash[11784]: [2022-08-25T12:02:23,065][INFO][logstash.agent] Pipelines running {:count=>2, :running_pipelines=>[:".monitoring-logstash", :main], :non_running_pipelines=>[]} Aug 25 12:02:22 logstash.example.com logstash[11784]: [2022-08-25T12:02:22,903][INFO][logstash.javapipeline][main] Pipeline started {"pipeline.id"=>"main"} Aug 25 12:02:22 logstash.example.com logstash[11784]: [2022-08-25T12:02:22,858][INFO][logstash.inputs.beats][main] Starting input listener {:address=>"0.0.0.0:5044"} ``` Thank you for any assistance. Joey ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [September 22, 2022, 3:38pm UTC](https://discuss.elastic.co/t/logstash-indexoutofboundsexception-writerindex-minwritablebytes-exceeds-maxcapacity/312943/2 "2022-09-22T15:38:16Z")
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