Not able to add classes in a directory to shared archive when using AppCDS (original) (raw)

David Holmes david.holmes at oracle.com
Thu Apr 5 10:04:18 UTC 2018

Moving to hotspot-runtime-dev

David

On 5/04/2018 7:15 PM, ashutosh mehra wrote:

I am trying to use App CDS for a sample application. My class files are in a directory which I specify as the classpath. I want these classes to be included in shared archive. Directory structure is like this: $ tree . ├── classes │ ├── SampleClass.class │ └── SampleClass.java ├── TestCDS.class └── TestCDS.java

I performed following steps: 1. Create the class list: $ java -Xshare:off -XX:+UseAppCDS -XX:DumpLoadedClassList=classes.list -cp .:classes TestCDS This generated the list of classes including my application classes TestCDS and SampleClass. 2. Create the shared archive: $ java -Xshare:dump -XX:+UseAppCDS -XX:SharedClassListFile=classes.list -XX:SharedArchiveFile=mycds.jcs -cp .:classes I get following error message: narrowklassbase = 0x0000000800000000, narrowklassshift = 3 Allocated temporary class space: 1073741824 bytes at 0x00000008c0000000 Allocated shared space: 3221225472 bytes at 0x0000000800000000 Error: non-empty directory '.' Hint: enable -Xlog:class+path=info to diagnose the failure Error occurred during initialization of VM CDS allows only empty directories in archived classpaths Java version is: openjdk version "10" 2018-03-20 OpenJDK Runtime Environment 18.3 (build 10+46) OpenJDK 64-Bit Server VM 18.3 (build 10+46, mixed mode) I have also tried with Java 11 EA build but got same output. Is this expected behavior? I am sure it would be useful for many if the classes loaded from a directory can also be stored in the shared archive. Regards, Ashutosh

More information about the jdk-dev mailing list