# Moving to Java 8? **URL:** \ **Category:** Elasticsearch\ **Created:** [January 21, 2015, 11:08pm UTC](https://discuss.elastic.co/t/moving-to-java-8/21764 "2015-01-21T23:08:37Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [January 21, 2015, 11:08pm UTC](https://discuss.elastic.co/t/moving-to-java-8/21764/1 "2015-01-21T23:08:37Z")
Hey, looking at the Oracle JDK road map, the end of public updates for JDK 7 comes closer, it will be in April 2015. [http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates](http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates) Lucene already started to test Java 9 and is finding issues like this [https://issues.apache.org/jira/browse/LUCENE-6169](https://issues.apache.org/jira/browse/LUCENE-6169) Now my question is, when will Elasticsearch switch to Java 8? I know it already runs on Java 8 but I mean Java 8 as the minimum requirement for source and target code of the compiler. Best, Jörg -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![andrew](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@andrew](https://discuss.elastic.co/u/andrew)\ **Post date:** [January 22, 2015, 1:52am UTC](https://discuss.elastic.co/t/moving-to-java-8/21764/2 "2015-01-22T01:52:34Z")
Hi Jorg, I’ve personally been using Java 8 with ES for a while. Although I can’t say when we’ll stop support for Java 7, as you can see from our support matrix recent versions of ES are supported on Java 8. [http://www.elasticsearch.com/support/matrix](http://www.elasticsearch.com/support/matrix) [http://www.elasticsearch.com/support/matrix](http://www.elasticsearch.com/support/matrix) Cheers, Andrew > On Jan 21, 2015, at 3:08 PM, [joergprante@gmail.com](mailto:joergprante@gmail.com) wrote: > > Hey, > > looking at the Oracle JDK road map, the end of public updates for JDK 7 comes closer, it will be in April 2015. > > [Oracle Java SE Support Roadmap](http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates) [http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates](http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates) > > Lucene already started to test Java 9 and is finding issues like this > > [[LUCENE-6169] Recent Java 9 commit breaks fsync on directory - ASF JIRA](https://issues.apache.org/jira/browse/LUCENE-6169) [https://issues.apache.org/jira/browse/LUCENE-6169](https://issues.apache.org/jira/browse/LUCENE-6169) > > Now my question is, when will Elasticsearch switch to Java 8? I know it already runs on Java 8 but I mean Java 8 as the minimum requirement for source and target code of the compiler. > > Best, > > Jörg > > -- > You received this message because you are subscribed to the Google Groups "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com) [mailto:elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com) [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm_medium=email&utm_source=footer). > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout) [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com](https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [January 22, 2015, 8:50am UTC](https://discuss.elastic.co/t/moving-to-java-8/21764/3 "2015-01-22T08:50:26Z")
No, that is not what I mean. I do not mean JVM support. I mean compiler support for the source. Switching to lambda expressions, streams, etc. - there is no version of ES that supports this. Jörg On Thu, Jan 22, 2015 at 2:52 AM, Andrew Selden \< [andrew.selden@elasticsearch.com](mailto:andrew.selden@elasticsearch.com)\> wrote: > Hi Jorg, > > I’ve personally been using Java 8 with ES for a while. Although I can’t > say when we’ll stop support for Java 7, as you can see from our support > matrix recent versions of ES are supported on Java 8. > > [http://www.elasticsearch.com/support/matrix](http://www.elasticsearch.com/support/matrix) > > Cheers, > Andrew > > On Jan 21, 2015, at 3:08 PM, [joergprante@gmail.com](mailto:joergprante@gmail.com) wrote: > > Hey, > > looking at the Oracle JDK road map, the end of public updates for JDK 7 > comes closer, it will be in April 2015. > > [Oracle Java SE Support Roadmap](http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates) > > Lucene already started to test Java 9 and is finding issues like this > > [[LUCENE-6169] Recent Java 9 commit breaks fsync on directory - ASF JIRA](https://issues.apache.org/jira/browse/LUCENE-6169) > > Now my question is, when will Elasticsearch switch to Java 8? I know it > already runs on Java 8 but I mean Java 8 as the minimum requirement for > source and target code of the compiler. > > Best, > > Jörg > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com) > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com](https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com) > [https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoFA89\_FdqKWyQMNCiMMEdBkCH%3DBVPRCcEP2nvDgonRgHw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoFA89_FdqKWyQMNCiMMEdBkCH%3DBVPRCcEP2nvDgonRgHw%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Jilles\_van\_Gurp](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jilles_van_gurp/32/879_2.png) [@Jilles\_van\_Gurp](https://discuss.elastic.co/u/Jilles_van_Gurp)\ **Post date:** [January 22, 2015, 10:44am UTC](https://discuss.elastic.co/t/moving-to-java-8/21764/4 "2015-01-22T10:44:40Z")
You should be able to access es from java 8 source code. Most collection classes will support streams already and lambdas and you can use lambdas in many places where you would use inner classes otherwise. I suspect, a full switch to java 8 might take some time for big projects such as elasticsearch as it is kind of disruptive. Java 6 support was only discontinued quite recently, I believe. I've been using java 8 for a few months but we don't use the elasticsearch internal API. We also run elasticsearch on Oracle java 8 without issues. Jilles On Thursday, January 22, 2015 at 9:50:38 AM UTC+1, Jörg Prante wrote: > No, that is not what I mean. I do not mean JVM support. > > I mean compiler support for the source. Switching to lambda expressions, > streams, etc. - there is no version of ES that supports this. > > Jörg > > On Thu, Jan 22, 2015 at 2:52 AM, Andrew Selden \< > [andrew...@elasticsearch.com](mailto:andrew...@elasticsearch.com) \\> wrote: > > > Hi Jorg, > > > > I’ve personally been using Java 8 with ES for a while. Although I can’t > > say when we’ll stop support for Java 7, as you can see from our support > > matrix recent versions of ES are supported on Java 8. > > > > [http://www.elasticsearch.com/support/matrix](http://www.elasticsearch.com/support/matrix) > > > > Cheers, > > Andrew > > > > On Jan 21, 2015, at 3:08 PM, [joerg...@gmail.com](mailto:joerg...@gmail.com) \ wrote: > > > > Hey, > > > > looking at the Oracle JDK road map, the end of public updates for JDK 7 > > comes closer, it will be in April 2015. > > > > [Oracle Java SE Support Roadmap](http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates) > > > > Lucene already started to test Java 9 and is finding issues like this > > > > [[LUCENE-6169] Recent Java 9 commit breaks fsync on directory - ASF JIRA](https://issues.apache.org/jira/browse/LUCENE-6169) > > > > Now my question is, when will Elasticsearch switch to Java 8? I know it > > already runs on Java 8 but I mean Java 8 as the minimum requirement for > > source and target code of the compiler. > > > > Best, > > > > Jörg > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com) > > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com](https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com) > > [https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/4eed0446-4e16-436e-a7c2-d3d63431ac4f%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/4eed0446-4e16-436e-a7c2-d3d63431ac4f%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [January 22, 2015, 6:03pm UTC](https://discuss.elastic.co/t/moving-to-java-8/21764/5 "2015-01-22T18:03:14Z")
It need not to be disruptive, Lucene trunk (6.x) already moved to Java 8, while older branches (4.x, 5.x) are on Java 7. Jörg On Thu, Jan 22, 2015 at 11:44 AM, Jilles van Gurp [jillesvangurp@gmail.com](mailto:jillesvangurp@gmail.com) wrote: > You should be able to access es from java 8 source code. Most collection > classes will support streams already and lambdas and you can use lambdas in > many places where you would use inner classes otherwise. I suspect, a full > switch to java 8 might take some time for big projects such as > elasticsearch as it is kind of disruptive. Java 6 support was only > discontinued quite recently, I believe. > > I've been using java 8 for a few months but we don't use the elasticsearch > internal API. We also run elasticsearch on Oracle java 8 without issues. > > Jilles > > On Thursday, January 22, 2015 at 9:50:38 AM UTC+1, Jörg Prante wrote: > > > No, that is not what I mean. I do not mean JVM support. > > > > I mean compiler support for the source. Switching to lambda expressions, > > streams, etc. - there is no version of ES that supports this. > > > > Jörg > > > > On Thu, Jan 22, 2015 at 2:52 AM, Andrew Selden \ > com\> wrote: > > > > > Hi Jorg, > > > > > > I’ve personally been using Java 8 with ES for a while. Although I can’t > > > say when we’ll stop support for Java 7, as you can see from our support > > > matrix recent versions of ES are supported on Java 8. > > > > > > [http://www.elasticsearch.com/support/matrix](http://www.elasticsearch.com/support/matrix) > > > > > > Cheers, > > > Andrew > > > > > > On Jan 21, 2015, at 3:08 PM, [joerg...@gmail.com](mailto:joerg...@gmail.com) wrote: > > > > > > Hey, > > > > > > looking at the Oracle JDK road map, the end of public updates for JDK 7 > > > comes closer, it will be in April 2015. > > > > > > [http://www.oracle.com/technetwork/java/eol-135779](http://www.oracle.com/technetwork/java/eol-135779). > > > html#Java6-end-public-updates > > > > > > Lucene already started to test Java 9 and is finding issues like this > > > > > > [[LUCENE-6169] Recent Java 9 commit breaks fsync on directory - ASF JIRA](https://issues.apache.org/jira/browse/LUCENE-6169) > > > > > > Now my question is, when will Elasticsearch switch to Java 8? I know it > > > already runs on Java 8 but I mean Java 8 as the minimum requirement for > > > source and target code of the compiler. > > > > > > Best, > > > > > > Jörg > > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "elasticsearch" group. > > > To unsubscribe from this group and stop receiving emails from it, send > > > an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com). > > > To view this discussion on the web visit [https://groups.google.com/d/](https://groups.google.com/d/) > > > msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx% > > > 2B9xPKL0aEw%[40mail.gmail.com](http://40mail.gmail.com) > > > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3\_%2BbgBf-m8zHskZ\_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoE9Hcdm3_%2BbgBf-m8zHskZ_bMvGiB3ODKYx%2B9xPKL0aEw%40mail.gmail.com?utm_medium=email&utm_source=footer) > > > . > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "elasticsearch" group. > > > To unsubscribe from this group and stop receiving emails from it, send > > > an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com). > > > To view this discussion on the web visit [https://groups.google.com/d/](https://groups.google.com/d/) > > > msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9% > > > [40elasticsearch.com](http://40elasticsearch.com) > > > [https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CFB72C3B-F0E5-4EBE-ABD5-D7D11CBA1AE9%40elasticsearch.com?utm_medium=email&utm_source=footer) > > > . > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/4eed0446-4e16-436e-a7c2-d3d63431ac4f%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/4eed0446-4e16-436e-a7c2-d3d63431ac4f%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/4eed0446-4e16-436e-a7c2-d3d63431ac4f%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/4eed0446-4e16-436e-a7c2-d3d63431ac4f%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEpQcWNGfi4NrZ7tx-HruwX96PY%2BS8EvUhY\_vqhzD0hRw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEpQcWNGfi4NrZ7tx-HruwX96PY%2BS8EvUhY_vqhzD0hRw%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**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, 12:37am UTC](https://discuss.elastic.co/t/moving-to-java-8/21764/6 "2017-07-06T00:37:11Z")