# ElasticSearch Max Bytes Length Exceeded Exception

**URL:** <https://discuss.elastic.co/t/elasticsearch-max-bytes-length-exceeded-exception/210009>\
**Category:** Elasticsearch\
**Created:** [November 29, 2019, 11:36pm UTC](https://discuss.elastic.co/t/elasticsearch-max-bytes-length-exceeded-exception/210009 "2019-11-29T23:36:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ricky\_paypal](https://avatars.discourse-cdn.com/v4/letter/r/cdc98d/32.png) [@ricky\_paypal](https://discuss.elastic.co/u/ricky_paypal)\
**Post date:** [November 29, 2019, 11:36pm UTC](https://discuss.elastic.co/t/elasticsearch-max-bytes-length-exceeded-exception/210009/1 "2019-11-29T23:36:20Z")

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Hello,

This error does not occur all the time, it is random, like 3 out of 10 depends on the traffic.  
When users perform a wildcard search, for example: _exception_  
**1 of 49 shards failed**

OS: Red Hat Enterprise Linux Server 7.7  
ES Version: 7.3.1  
Nodes: 1  
Disk Available: 84.03% (1.3 TB / 1.5 TB)  
JVM Heap: 7.42% (3.6 GB / 47.9 GB)  
Documents: 597,982,988  
Disk Usage: 231.6 GB  
Primary Shards: 69  
Replica Shards: 0  
Total Shards: 119  
Unassigned Shards: 50

[2019-11-29T23:33:15,802][DEBUG][o.e.a.s.TransportSearchAction] [node-1] [324819] Failed to execute fetch phase  
org.elasticsearch.transport.RemoteTransportException: [node-1][10.8.10.61:9300][indices:data/read/search[phase/fetch/id]]  
Caused by: org.apache.lucene.util.BytesRefHash$MaxBytesLengthExceededException: bytes can be at most 32766 in length; got 37022  
at org.apache.lucene.util.BytesRefHash.add(BytesRefHash.java:265) ~[lucene-core-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:34:03]  
at org.apache.lucene.index.memory.MemoryIndex.storeTerms(MemoryIndex.java:593) ~[lucene-memory-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:49]  
at org.apache.lucene.index.memory.MemoryIndex.addField(MemoryIndex.java:475) ~[lucene-memory-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:49]  
at org.apache.lucene.index.memory.MemoryIndex.addField(MemoryIndex.java:453) ~[lucene-memory-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:49]  
at org.apache.lucene.index.memory.MemoryIndex.addField(MemoryIndex.java:432) ~[lucene-memory-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:49]  
at org.apache.lucene.search.uhighlight.MemoryIndexOffsetStrategy.getOffsetsEnum(MemoryIndexOffsetStrategy.java:98) ~[lucene-highlighter-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:48]  
at org.apache.lucene.search.uhighlight.FieldHighlighter.highlightFieldForDoc(FieldHighlighter.java:76) ~[lucene-highlighter-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:48]  
at org.apache.lucene.search.uhighlight.UnifiedHighlighter.highlightFieldsAsObjects(UnifiedHighlighter.java:639) ~[lucene-highlighter-8.1.0.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:48]  
at org.apache.lucene.search.uhighlight.CustomUnifiedHighlighter.highlightField(CustomUnifiedHighlighter.java:102) ~[elasticsearch-7.3.1.jar:8.1.0 dbe5ed0b2f17677ca6c904ebae919363f2d36a0a - ishan - 2019-05-09 19:35:48]  
at org.elasticsearch.search.fetch.subphase.highlight.UnifiedHighlighter.highlight(UnifiedHighlighter.java:118) ~[elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.search.fetch.subphase.highlight.HighlightPhase.hitExecute(HighlightPhase.java:107) ~[elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.search.fetch.FetchPhase.execute(FetchPhase.java:169) ~[elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.search.SearchService.lambda$executeFetchPhase$5(SearchService.java:507) ~[elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.search.SearchService$1.doRun(SearchService.java:347) ~[elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.common.util.concurrent.TimedRunnable.doRun(TimedRunnable.java:44) [elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:758) [elasticsearch-7.3.1.jar:7.3.1]  
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) [elasticsearch-7.3.1.jar:7.3.1]  
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]  
at java.lang.Thread.run(Thread.java:835) [?:?]

Can this be fixed? or any workaround?

Thanks in advance

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 27, 2019, 11:36pm UTC](https://discuss.elastic.co/t/elasticsearch-max-bytes-length-exceeded-exception/210009/2 "2019-12-27T23:36:22Z")

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