# Analysis-icu Plugin won't install
**URL:** https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698
**Category:** Elasticsearch
**Created:** [November 2, 2016, 10:28am UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698 "2016-11-02T10:28:13Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@Palandos](https://discuss.elastic.co/u/Palandos)
#### Post date: [November 2, 2016, 10:28am UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/1 "2016-11-02T10:28:14Z")
trying to install the ICU-Plugin in elasticsearch 5.0.0 with the command given in the documentation (sudo bin/elasticsearch-plugin install analysis-icu) and get the following stack trace:
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/elasticsearch/plugins/PluginCli : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
Is it that elasticsearch5.0.0 is running with JAVA8 and the plugin doesn't support that?
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [November 2, 2016, 10:44am UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/2 "2016-11-02T10:44:58Z")
Please format your code using `` icon. It will make your post more readable.
Your config is probably wrong or something is not working as expected with the `elasticsearch-plugin` script.
What gives `java -version`?
You must have Java8 for sure.
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### Author:  [@Palandos](https://discuss.elastic.co/u/Palandos)
#### Post date: [November 2, 2016, 10:56am UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/3 "2016-11-02T10:56:15Z")
on java -version I get the following:
java version "1.8.0\_112"
Java(TM) SE Runtime Environment (build 1.8.0\_112-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.112-b15, mixed mode)
What would I have to look for in the config?
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [November 2, 2016, 11:10am UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/4 "2016-11-02T11:10:00Z")
Windows or Linux?
We are basically using this script: [https://github.com/elastic/elasticsearch/blob/5.0/distribution/src/main/resources/bin/elasticsearch-plugin](https://github.com/elastic/elasticsearch/blob/5.0/distribution/src/main/resources/bin/elasticsearch-plugin)
So check:
- `$JAVA_HOME`
- and if not set what gives `which java`
---
### Author:  [@Palandos](https://discuss.elastic.co/u/Palandos)
#### Post date: [November 2, 2016, 11:44am UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/5 "2016-11-02T11:44:16Z")
I am working on Linux.
The execution of
- **echo $JAVA\_HOME** returns **/opt/java8**
and
- **which java** returns **/opt/java8/bin/java**
**EDIT:**
I've downloaded and extracted the .zip that is also referenced in the documentation
[https://www.elastic.co/guide/en/elasticsearch/plugins/5.0/analysis-icu.html](https://www.elastic.co/guide/en/elasticsearch/plugins/5.0/analysis-icu.html)
into the plugins folder and it works fine.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [November 2, 2016, 12:07pm UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/6 "2016-11-02T12:07:03Z")
Oh? I did not notice but you are using `sudo`.
So may be your `root` user does not have the right things.
What if?
```auto
sudo echo $JAVA_HOME
sudo which java
```
The manual thing can work yes but TBH I don't like it. It's hiding something wrong here.
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### Author:  [@Palandos](https://discuss.elastic.co/u/Palandos)
#### Post date: [November 2, 2016, 12:23pm UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/7 "2016-11-02T12:23:25Z")
> [@dadoonet](#):
>
> sudo echo $JAVA\_HOME
> sudo which java
The $JAVA\_HOME Variable returns the same when i run it with sudo but "sudo which java" now returns
- /usr/bin/java
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [November 2, 2016, 12:37pm UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/8 "2016-11-02T12:37:52Z")
I think that `echo $JAVA_HOME` is evaluated here before sudoing.
Whatever we can see that the root user is not aware of your Java8 install. This is my guess. I believe that if you run `/usr/bin/java -version` you will have a Java7 result?
Can you install the plugin without `sudo`?
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### Author:  [@Palandos](https://discuss.elastic.co/u/Palandos)
#### Post date: [November 2, 2016, 12:59pm UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/9 "2016-11-02T12:59:46Z")
> [@dadoonet](#):
>
> I believe that if you run /usr/bin/java -version you will have a Java7 result?
Exactly that is the result 😉
And I am able to install it via commandline when I drop the sudo.
Cheers for all the help, keep it up 🙂
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 10:07pm UTC](https://discuss.elastic.co/t/analysis-icu-plugin-wont-install/64698/10 "2017-07-05T22:07:24Z")