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    Vigneshwaran
    @imvigneshb
    Thanks for the help @zak905 . I will try with my project
    Vigneshwaran
    @imvigneshb
    It's always throwing Error refreshing BeanMetaDataManagerCache/AnnotatedMetaDataProvider cache.
    vikrantch-hk
    @vikrantch-hk
    Hi team does this project supports reloading of Spring beans also say I am using spring boot and creating some controller or service beans will they be loaded without application restart
    vikrantch-hk
    @vikrantch-hk
    @zak905 please let me know answer for my query above
    Zakaria Amine
    @zak905
    @vikrantch-hk Yes it works wit spring boot, here is a blog post I wrote recently about it: http://www.zakariaamine.com/2018-01-06/using-hotswap-agent-to-reload-code
    vikrantch-hk
    @vikrantch-hk
    @zak905 thanks a lot I am able to hot swap Spring components, but seems like hibernate entities aren't getting hot swapped.
    Vladimir Dvorak
    @skybber
    @zakaria : nice written article !
    Zakaria Amine
    @zak905
    thanks! I appreciate
    vikrantch-hk
    @vikrantch-hk
    @zak905 is there any additional changes for hotswapping new hibernate entities. I am getting unknown entity exception for hotswapped entities
    I have never tried with hibernate
    vikrantch-hk
    @vikrantch-hk
    @zak905 thanks
    vikrantch-hk
    @vikrantch-hk
    I am getting 'failed to create java virtual machine' error in eclipse while switching workspace , has anybody faced same issue
    Vladimir Dvorak
    @skybber
    I don't have this problem. I'm using more separated workspaces and choose one of them on eclipse start, even I don't know that it is possible to switch workspaces when working in another one.
    vikrantch-hk
    @vikrantch-hk
    @skybber i removed -vm and -vmargs from eclipse.ini and it worked
    vikrantch-hk
    @vikrantch-hk
    can we enable hot swapping while debugging also, as of now my application restarts on adding new classes
    vikrantch-hk
    @vikrantch-hk
    @skybber please help
    Vladimir Dvorak
    @skybber
    You should disable auto realoding on Modules page in Sever Setup
    vikrantch-hk
    @vikrantch-hk
    @skybber hot to disable auto reload if using spring boot's embedded tomcat
    vikrantch-hk
    @vikrantch-hk
    @skybber is there any way to hotswap while doing remote debugging
    Vladimir Dvorak
    @skybber
    There is no problem to do hotswap when remote debugging. But only the modification of class is allowed, creating a new class is not supported. You should copy new classes to destination beforehand hotswap to support this kind of change.
    vikrantch-hk
    @vikrantch-hk
    @skybber is there any way to configure this in intellij (copying new classes to destination) using maven
    Vladimir Dvorak
    @skybber
    I'm not expert on Intellij, but you can definitely use some external tool to synchronize it. New class must be copied to destination before it is used (loaded) by JVM
    Andreas Resios
    @resios

    I'm trying to build the master branch for hotswap (mvn clean install -DskipTests) to get the latest patches but when I try to run it in the JVM I'm getting the following stacktrace:

    HOTSWAP AGENT: 11:56:11.320 DEBUG (org.hotswap.agent.plugin.jvm.ClassInitPlugin) - Skipping old field log
    HOTSWAP AGENT: 11:56:11.322 DEBUG (org.hotswap.agent.plugin.jvm.ClassInitPlugin) - Skipping old field savedBeers
    HOTSWAP AGENT: 11:56:11.322 DEBUG (org.hotswap.agent.plugin.jvm.ClassInitPlugin) - Skipping old field nextBeerId
    Exception in thread "Thread-19" java.lang.IllegalStateException: Unable to redefine classes
            at org.hotswap.agent.config.PluginManager.hotswap(PluginManager.java:276)
            at org.hotswap.agent.plugin.hotswapper.HotswapperPlugin$1.executeCommand(HotswapperPlugin.java:94)
            at org.hotswap.agent.command.impl.CommandExecutor.run(CommandExecutor.java:25)
    Caused by: java.lang.UnsupportedOperationException: class redefinition failed: attempted to add a method
            at sun.instrument.InstrumentationImpl.redefineClasses0(Native Method)
            at sun.instrument.InstrumentationImpl.redefineClasses(InstrumentationImpl.java:170)
            at org.hotswap.agent.config.PluginManager.hotswap(PluginManager.java:272)
            ... 2 more

    This seems similar with #162, but I've verified that the JVM has dcevm installed and it's used.
    Also if I switch back to the latest official release, it starts working again.

    I tried running mvn release:prepare release:perform but it fails to generate a jar file.
    For building I'm using Oracle JDK 1.8.0_151
    For running I'm using Oracle JDK 1.8.0_144

    Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
    Dynamic Code Evolution 64-Bit Server VM (build 25.71-b01-dcevmlight-2, mixed mode)

    Any help would be appreciated.

    Andreas Resios
    @resios
    @resios I found the problem. As indicated by the stacktrace, dcevm was not used. Apparently if java is started with the -server flag, the -XXaltjvm=dcevm -javaagent:/home/deceneu/hotswap/hotswapagent/hotswap-agent-1.1.0-SNAPSHOT.jar need to be after it, otherwise the -XXaltjvm=dcevm is ignored. After re-positioning the arguments, everything works as expected.
    Alexander Bartash
    @AlexanderBartash
    Hi guys, hi @skybber I am trying to figure out why version 1.1.0 works in my project based on SAP Hybris platform and 1.2.0 does not. Do you have any information how to debug hotswap agent? I am particularly interested in Spring Plugin.
    Alexander Bartash
    @AlexanderBartash
    More precisely 1.2.0 works but it screws up spring context in the runtime and the app does not start. 1.2.1 does the same and logs additional errors.
    Vladimir Dvorak
    @skybber
    Hi, thanks for info. I don't have any experience with Hybris neither I have any prepared tests for it. But may be you can find out of your own. It is not so hard to do. All what you need is the last working commit ID and then you can do "git bisect" on repository and build/test each itermidiate version. We don't have too much versions since 1.1
    Alexander Bartash
    @AlexanderBartash
    Yeah, that is what I am going to do. I am just curious if there is any way to debug the agent in runtime. It may be not possible because of the way it is being run.
    Actually breakpoints seem to be working. Thanks :)
    Alexander Bartash
    @AlexanderBartash
    What does tomcat plugin do?
    Vladimir Dvorak
    @skybber
    You can change hotswapagent's code when you debug hotswapagent, it seems creazy but you really do it.
    Tomcat plugin patches the Tomcat's(Tomee, Payara, GlassFish) WebAppClassloader and allow to use extraClassPath+webappDir properties.
    There is some description of extraClassPath & webappDir : http://hotswapagent.org/mydoc_configuration.html
    Vladimir Dvorak
    @skybber
    This settings are really cool for debugging apps in Docker.
    Alexander Bartash
    @AlexanderBartash
    Thank you
    nwsduy
    @nwsduy
    Hi all, i'm using Hotswap in my project.
    However, i found that project lib in web-inf/lib can not be reloaded when i debugged in Wilfly with Eclipse.
    Is there any solution for this problems?
    Vladimir Dvorak
    @skybber
    content of jar is not able to reload but you can use extraClassPath, look at http://hotswapagent.org/mydoc_configuration.html
    nwsduy
    @nwsduy
    Thank for your confirmation.
    I'm wondering that is there any way to config eclipse to move it jar class into web-inf/classes instead of packing it into jar.
    nwsduy
    @nwsduy

    After move class from jar into web-inf/classes I'm facing with some problem:

    1. Update Web services: Get warning about [Multiple resource methods match request]
    2. Update Web services: Sometime ConcurrentModificationException happen
    3. Update statebean: If i try to inject another bean or do something complicated, NullPointerException will happen

    Can some one help me on this case?

    Vladimir Dvorak
    @skybber
    Please create an issue on github with full stacktrace & description
    nwsduy
    @nwsduy
    After a little of debuging i found:
    1. This is our mistake. Developer add Stateless to WebServices class.
    2. May be same cause with 1.
    3. Look like the bean is redefined it still error. I will try to confirm this problem again and create issues if need.
      Thanks.
    Vladimir Dvorak
    @skybber
    Could you create minimalistic non-working example? We have example apps used for testing e.g. https://github.com/HotswapProjects/HotswapAgentExamples/tree/master/deltaspike-hibernate-jsf
    nwsduy
    @nwsduy
    Got it, i will give it a try on example source code.
    Edoardo Luppi
    @lppedd
    Hi guys. Is HA compatible with WebLogic?
    Vladimir Dvorak
    @skybber
    Hi, look at HA WebLogic issues. We didn't do any tests with WebLogic in past, may be you can be much successful with OpenLiberty.
    Sorry for that, liberty is not optin for WebLogic...
    Edoardo Luppi
    @lppedd
    Don't worry, I'll do a couple of test
    Edoardo Luppi
    @lppedd
    Seems it's working fine for simple things. A question, has anyone tried DCEVM and HotswapAgent with EJB 2.x?
    Vladimir Dvorak
    @skybber
    EJB s are not supported