Java 11 Support

[Thomas Heigl]

Hi,

I'm currently using HotswapAgent with JDK8 in my project. I switched to it from jRebel earlier this year and it works great for my application (Spring, Hibernate, Wicket).

We skipped JDK9 and 10, but would like to move to JDK11 as soon as possible since it is first LTS release since JDK8.

Are you planning to support JDK11? If so, do you have any timeframe for it?

Best regards,

Thomas

[vladimir dvorak]

I'm planning to do it, hopefully I'll have some free time in November/December for   it.

[Thomas Heigl]

Fantastic!

If you need any help with testing (on MacOS), please let me know.

Thomas

[vladimir dvorak]

  Hi,

dcevm for java11 is just available at:

https://github.com/HotswapProjects/openjdk-jdk11/tree/dcevm

(branch dcevm forked from openjdk)

  It is still an experimental branch, but nearly all dcevm tests have passed. We must do port of HotswapAgent  for j11, there are issues

with javassist at least. I didn't publish any binaries up to now,  so you should build it yourself. Since we don't have Macs, any help

will be appreciated!

thanks, Vladimir

[Thomas Heigl]

Hi Vladimir,

That's great news!

I already built DCEVM for JDK10 recently, so this shouldn't be a problem.

However, with JDK10 I ran into some issues with HotswapAgent as documented here: https://github.com/HotswapProjects/HotswapAgent/issues/218

I couldn't really continue my tests because of NPEs when specifying extraClasspath.

Are there any news with respect to HotswapAgent? Does it make sense to build JDK11 and try it with the current version of HotswapAgent or should I wait?

Thanks,

Thomas

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[vladimir dvorak]

I'm pretty sure HA doesn't work with j11 now, since HA uses old javassist version internally. There is active javassist repo:

https://github.com/jboss-javassist/javassist

We must carefully upgrade javassis to 3.24.0-RC and check if it backward compatible...

As far as your problem with j9+HA - I didn't do a lot of tests with HA + j9/j10 since I don't use it. I'm still using j8, but we're planning

to improve it on j11. If you need a help with openjdk  build or wicket plugin , which could be interesting,  please contact me by e-mail.

regards Vladimir

[Thomas Heigl]

Hi Vladimir,

I saw you did a lot of work on the JDK11 branch. Thanks a lot!

I just tried to build the current branch on MacOS. The build works, but in the end it fails with:

Creating jdk image
HotswapAgent not found on path:'/dcvem/openjdk-jdk11/build/macosx-x86_64-normal-server-release/jdk/lib/hotswap/hotswap-agent.jar'
Stopping sjavac server
Finished building target 'images' in configuration 'macosx-x86_64-normal-server-release'

What do I have to do to include the bundle the hotswap agent with the build?

Best,

Thomas 

[vladimir dvorak]

   Hi,

you can fix it, manually copy the HotswapAgent-1.3.1-SNAPSHOT.jar (as hotswap-agent.jar) to lib/hotswap folder. Btw we have now

automated builds at this repository: https://github.com/TravaOpenJDK/trava-jdk-11-dcevm

actually for OSX + linux, OSX looks ok, still needs copy of HA at the end of the script, Linux build has some unknown

gcc problem with dcevm patch, windows build sill missing...

regards vladimir