unable to compose /build image file

[pritip123]

I trying to do capstan build for a Maven project in EC2 but while composing the image file I am getting the below error . I have followed the below steps wget -O - https://raw.githubusercontent.com/mikelangelo-project/capstan/master/scripts/download | bash capstan pull mike/osv-loader

Can you please help me . Resolved runtime into: java Prepending 'java' runtime dependencies to dep list: [eu.mikelangelo-project.osv.java] package eu.mikelangelo-project.osv.java is not available in the given repository (https://mikelangelo-capstan.s3.amazonaws.com/)

[miha-plesko]

@pritip123 problem is that the precompiled Capstan that scripts/download fetched you is not up-to-date. Could you please try to build the latest master?

Alternatively, you can download it from here: http://x.k00.fr/1yosr (compiled latest master). Thanks for reporting the issue, I'll update the scripts/download script soon.

[pritip123]

Hi miha-plesko , Thanks for replying , I tried building it again using : wget -O - https://raw.githubusercontent.com/mikelangelo-project/capstan/master/scripts/download | bash capstan pull mike/osv-loader

but still the error is coming can you please give the master link you are talking or updated.

[miha-plesko]

Hello @pritip123, could you please try to download the Capstan binary like this:

curl "https://xlab.koofr.net/content/links/4e9a3f4e-adbb-4c82-b199-ab68b8d39e32/files/get/capstan?path=" > $HOME/bin/capstan

Then it should work.

[pritip123]

Thanks a lot miha-plesko its working now . But do you have any idea why capstan image file its not able to get AwsSdkMetrics.java class though i have added the dependency .Its running well without capstan build but a capstan build image is giving below exception while execution . java.lang.NoClassDefFoundError: javax/management/MalformedObjectNameException at com.amazonaws.jmx.SdkMBeanRegistrySupport.registerMetricAdminMBean(SdkMBeanRegistrySupport.java:27) at com.amazonaws.metrics.AwsSdkMetrics.registerMetricAdminMBean(AwsSdkMetrics.java:398) at com.amazonaws.metrics.AwsSdkMetrics.(AwsSdkMetrics.java:359) at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.(AmazonDynamoDBClient.java:76)

[miha-plesko]

Just to double-check:

• did you produce a fat jar out of your application with all the dependencies in it?
• did you provide meta/run.yaml like this?

I'm asking because we've updated Capstan since you've reported this issue so that it now automatically runs the .jar properly.

If you provide some more information (say content of your meta/run.yaml and command that you use to run the Java application on your machine) we could probably be of some more help.

[pritip123]

Hi miha , Thanks for helping out . Yes i have generated the jar file wth all dependencies but the problem what It seems is that during capstan build its taking JRE instead of JDK and that might be causing the error .after trying to resolve the above exception now I got the following exception during the runtime java.lang.NoClassDefFoundError: java/lang/management/ManagementFactory at com.amazonaws.jmx.MBeans.getMBeanServer(MBeans.java:114) at com.amazonaws.jmx.MBeans.registerMBean(MBeans.java:50) at com.amazonaws.jmx.SdkMBeanRegistrySupport.registerMetricAdminMBean(SdkMBeanRegistrySupport.java:27) at com.amazonaws.metrics.AwsSdkMetrics.registerMetricAdminMBean(AwsSdkMetrics.java:398) at com.amazonaws.metrics.AwsSdkMetrics.(AwsSdkMetrics.java:359) at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.(AmazonDynamoDBClient.java:76)

I am using the following command to get the capstan image and the run.yaml is according to link given link sudo capstan package init --name test --title Test --author test sudo mvn clean install sudo capstan runtime init --runtime java sudo capstan package compose test sudo capstan run test

[miha-plesko]

@pritip123 could you please try to include this in your meta/package.yaml and then compose the unikernel:

# meta/package.yaml

name: demo
title: demo
author: demo
require:
  - openjdk8-zulu-compact3-with-java-beans # <---------------------- this

By default the runtime: java requires openjdk8-zulu-compact1, but you seem to be needing java beans as well. Looking forward to be hearing whether this resolved the issue.

[pritip123]

Hi miha , Thanks , Its working now but I came across with new exception

Caused by: javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty at sun.security.ssl.Alerts.getSSLException(Alerts.java:208) at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1959)

[gasper-vrhovsek]

Hi @pritip123 ,

i think you just encountered this: https://stackoverflow.com/questions/6784463/error-trustanchors-parameter-must-be-non-empty

Quoted from the stackoverflow:

ca-certificates-java is not a dependency in the Oracle JDK/JRE so this must be explicitly installed

[ukeshkumar]

Hi Miha Pleško,

Regarding above SSLException, I am using 'openjdk8-zulu-compact3-with-java-beans' package for my java application and Capstan binary, packages & repositories as below, http://x.k00.fr/0xmx0 | password: 120344 -> this is the latest Capstan packages & repository. http://x.k00.fr/3ub70 ->this is the latest Capstan binary that I've used (development branch)

capstan runtime list RUNTIME DESCRIPTION DEPENDENCIES
native Run arbitrary command inside OSv [] node Run JavaScript NodeJS 4.4.5 application [node-4.4.5 ] java Run Java application [openjdk8-zulu-compact1]

I have done the followings and the issue got resolved.

Added aws certificate to cacerts file in the below path, etc/pki/ca-trust/extracted/java/cacerts of the application directory.

Added cacerts link file (by default it is not available) ./usr/lib/jvm/java/jre/lib/security/cacerts -> ../../../../../../../etc/pki/java/cacerts

After adding the above two changes, I am not getting SSLException. Want to know is this the correct way or any other better way available ?

Thanks, Ukesh

[ukeshkumar]

Found the root-cause, /usr/lib/jvm/java/jre/lib/security/cacerts -> ../../../../../../../etc/pki/java/cacerts

The above link file is not available in 'openjdk8-zulu-compact1' package.

Could you suggest / share the stable release files which we can use ?

Thanks for your support..

[miha-plesko]

Hi, sorry for delayed response - did you manage to resolve the issue? If not, could you please try to use openjdk8-zulu-compact3-with-java-beans package instead of openjdk8-zulu-compact1? There should be some more files in there, not sure if this one among them.