# Java 7 Usage Is Not Recommended

**URL:** <https://discuss.elastic.co/t/java-7-usage-is-not-recommended/4997>\
**Category:** Elasticsearch\
**Created:** [July 29, 2011, 8:17am UTC](https://discuss.elastic.co/t/java-7-usage-is-not-recommended/4997 "2011-07-29T08:17:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\
**Post date:** [July 29, 2011, 8:17am UTC](https://discuss.elastic.co/t/java-7-usage-is-not-recommended/4997/1 "2011-07-29T08:17:51Z")

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Hi All,

```
You might have seen the previous thread, but I am sending a direct mail

```

in any case. Java 7 has just been released, but it is not recommended for  
use with elasticsearch (lucene). More details here:  
[http://markmail.org/thread/kulrw4sm2nsshrta](http://markmail.org/thread/kulrw4sm2nsshrta). Will update when it is.

-shay.banon

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**Author:** ![Clinton\_Gormley](https://avatars.discourse-cdn.com/v4/letter/c/50afbb/32.png) [@Clinton\_Gormley](https://discuss.elastic.co/u/Clinton_Gormley)\
**Post date:** [July 29, 2011, 5:45pm UTC](https://discuss.elastic.co/t/java-7-usage-is-not-recommended/4997/2 "2011-07-29T17:45:24Z")

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Hiya

> ```
> You might have seen the previous thread, but I am sending a direct
> 
> ```
> 
> mail in any case. Java 7 has just been released, but it is not  
> recommended for use with elasticsearch (lucene). More details  
> here: [http://markmail.org/thread/kulrw4sm2nsshrta](http://markmail.org/thread/kulrw4sm2nsshrta). Will update when it  
> is.

And besides the loop bug in hotspot, I see this comment was made here:

> **[Home](https://lucidworks.com/)**
>
> Lucidworks' Fusion platform uses industry-leading search technology to power search & discovery for the largest & most successful companies. Request a demo today.

```
    In case you upgrade to Java 7, remember that you may have to
    reindex, as the unicode version shipped with Java 7 changed and
    tokenization behaves differently (e.g. lowercasing). For more
    information, read JRE_VERSION_MIGRATION.txt in your distribution
    package!

```

clint

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 3:58am UTC](https://discuss.elastic.co/t/java-7-usage-is-not-recommended/4997/3 "2017-07-06T03:58:48Z")

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