# Inconsistent definition of size field in ByteStreamOutput.java
**URL:** https://discuss.elastic.co/t/inconsistent-definition-of-size-field-in-bytestreamoutput-java/341874
**Category:** Elasticsearch
**Created:** [August 29, 2023, 9:42am UTC](https://discuss.elastic.co/t/inconsistent-definition-of-size-field-in-bytestreamoutput-java/341874 "2023-08-29T09:42:54Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Paras\_Malik](https://discuss.elastic.co/u/Paras_Malik)
#### Post date: [August 29, 2023, 9:42am UTC](https://discuss.elastic.co/t/inconsistent-definition-of-size-field-in-bytestreamoutput-java/341874/1 "2023-08-29T09:42:54Z")
The definition of Size field in ByteStreamOutput changes from size of store data at the [initialisation](https://github.com/elastic/elasticsearch/blob/main/server/src/main/java/org/elasticsearch/common/util/BigArrays.java#L544) of BigByteArray to capacity of the BigByteArray at the time of [growing](https://github.com/elastic/elasticsearch/blob/main/server/src/main/java/org/elasticsearch/common/util/BigArrays.java#L577) the Array.
What is the correct definition of size field here ?
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### Author:  [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)
#### Post date: [August 30, 2023, 8:19pm UTC](https://discuss.elastic.co/t/inconsistent-definition-of-size-field-in-bytestreamoutput-java/341874/2 "2023-08-30T20:19:06Z")
The size field is correct, the confusion is over the use of the `BigArrays#grow` method which may choose to grow to a larger size than requested:
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 27, 2023, 8:19pm UTC](https://discuss.elastic.co/t/inconsistent-definition-of-size-field-in-bytestreamoutput-java/341874/3 "2023-09-27T20:19:25Z")
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