# Circuit breaking Issue occurring

**URL:** <https://discuss.elastic.co/t/circuit-breaking-issue-occurring/378386>\
**Category:** Elasticsearch\
**Created:** [May 21, 2025, 1:03pm UTC](https://discuss.elastic.co/t/circuit-breaking-issue-occurring/378386 "2025-05-21T13:03:23Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![mnaumtian](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mnaumtian/32/143266_2.png) [@mnaumtian](https://discuss.elastic.co/u/mnaumtian)\
**Post date:** [May 21, 2025, 1:03pm UTC](https://discuss.elastic.co/t/circuit-breaking-issue-occurring/378386/1 "2025-05-21T13:03:23Z")

</div>

"root\_cause" : [  
{  
"type" : "circuit\_breaking\_exception",  
"reason" : "[fielddata] Data too large, data for [\_id] would be [434536627/414.4mb], which is larger than the limit of [429496729/409.5mb]",  
"bytes\_wanted" : 434536627,  
"bytes\_limit" : 429496729,  
"durability" : "PERMANENT"  
}  
],  
"type" : "search\_phase\_execution\_exception",  
"reason" : "all shards failed",  
"phase" : "query",  
"grouped" : true,  
"failed\_shards" : [  
{  
"shard" : 0,  
"index" : "oncologyapiprod",  
"node" : "rcUfL0eVQCevLSpePX7oEg",  
"reason" : {  
"type" : "exception",  
"reason" : "java.util.concurrent.ExecutionException: CircuitBreakingException[[fielddata] Data too large, data for [\_id] would be [434536627/414.4mb], which is larger than the limit of [429496729/409.5mb]]",  
"caused\_by" : {  
"type" : "execution\_exception",  
"reason" : "execution\_exception: CircuitBreakingException[[fielddata] Data too large, data for [\_id] would be [434536627/414.4mb], which is larger than the limit of [429496729/409.5mb]]",  
"caused\_by" : {  
"type" : "circuit\_breaking\_exception",  
"reason" : "[fielddata] Data too large, data for [\_id] would be [434536627/414.4mb], which is larger than the limit of [429496729/409.5mb]",  
"bytes\_wanted" : 434536627,  
"bytes\_limit" : 429496729,  
"durability" : "PERMANENT"  
}  
}  
}  
}  
]

---

<div class="post-metadata">

**Author:** ![stephenb](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/stephenb/32/40856_2.png) [@stephenb](https://discuss.elastic.co/u/stephenb)\
**Post date:** [May 21, 2025, 1:45pm UTC](https://discuss.elastic.co/t/circuit-breaking-issue-occurring/378386/2 "2025-05-21T13:45:32Z")

</div>

Hi @mnaumtian Welcome to the community.

Perhaps take a look at this thread there are good suggestions.

> [@Finding out cause of circuit breaking exception (Data too large)](https://discuss.elastic.co/t/finding-out-cause-of-circuit-breaking-exception-data-too-large/351217):
>
> Hi, I'm getting the error below occasionally, and I'm trying to find the cause of it so I can try to resolve it. circuit\_breaking\_exception: [parent] Data too large, data for [\<http\_request\>] would be [32620387928/30.3gb], which is larger than the limit of [31621696716/29.4gb], real usage: [32620387928/30.3gb], new bytes reserved: [0/0b], usages [eql\_sequence=0/0b, fielddata=24272253421/22.6gb, request=0.0b, inflight\_requests=0/0b, model\_inference=0.0b] I'm running ES v8.8.0, with multiple in…

---

<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [May 21, 2025, 2:10pm UTC](https://discuss.elastic.co/t/circuit-breaking-issue-occurring/378386/3 "2025-05-21T14:10:20Z")

</div>

That seems to be a very low limit so it seems you are running with a very small heap size that apparently is not sufficient. Can you try increasing RAM and the heap size (should be max 50% of RAM)?