Problem with Java SDK 1.7.1, java.lang.NoClassDefFoundError: Could not initialize class com.google.apphosting.api.DatastorePb$Query

[Emanuele Ziglioli]

I'm experiencing an exception with the new SDK. It looks like what's described in this old post:

https://groups.google.com/forum/?fromgroups=#!msg/google-appengine-java/xiDijH7S8Ow/udo8DPEjtR0J

java.lang.NoClassDefFoundError: Could not initialize class com.google.apphosting.api.DatastorePb$Query

Here's the API call that causes the error PreparedQuery.asIterable():

PreparedQuery p = getDatastore().prepare(query);
List<Entity> entities = new ArrayList<Entity>();
for (Entity entity : p.asIterable(FetchOptions.Builder.withChunkSize(CHUNK_SIZE))) {
entities.add(entity);
}

And the Stack Trace:

Problem accessing /. Reason:
tried to access class com.google.appengine.repackaged.com.google.common.base.Equivalences from class com.google.appengine.repackaged.com.google.common.collect.Interners$CustomInterner
Caused by:
java.lang.IllegalAccessError: tried to access class com.google.appengine.repackaged.com.google.common.base.Equivalences from class com.google.appengine.repackaged.com.google.common.collect.Interners$CustomInterner
at com.google.appengine.repackaged.com.google.common.collect.Interners$CustomInterner.<init>(Interners.java:77)
at com.google.appengine.repackaged.com.google.common.collect.Interners.newWeakInterner(Interners.java:118)
at com.google.appengine.repackaged.com.google.io.protocol.ProtocolSupport.<clinit>(ProtocolSupport.java:55)
at com.google.apphosting.api.DatastorePb$Query.<init>(DatastorePb.java:1248)
at com.google.apphosting.api.DatastorePb$Query$1.<init>(DatastorePb.java:2988)
at com.google.apphosting.api.DatastorePb$Query.<clinit>(DatastorePb.java:2988)
at com.google.appengine.api.datastore.QueryTranslator.convertToPb(QueryTranslator.java:28)
at com.google.appengine.api.datastore.PreparedQueryImpl.convertToPb(PreparedQueryImpl.java:181)
at com.google.appengine.api.datastore.PreparedQueryImpl.runQuery(PreparedQueryImpl.java:134)
at com.google.appengine.api.datastore.PreparedQueryImpl.asIterator(PreparedQueryImpl.java:66)
at com.google.appengine.api.datastore.BasePreparedQuery$1.iterator(BasePreparedQuery.java:26)
at org.vosao.dao.BaseDaoImpl.selectNotCache(BaseDaoImpl.java:278)

[Emanuele Ziglioli]

This is a different stack trace for the same error (not sure why I see different stack traces)

HTTP ERROR 500

Problem accessing /. Reason:

    Could not initialize class com.google.apphosting.api.DatastorePb$Query

Caused by:

java.lang.NoClassDefFoundError: Could not initialize class com.google.apphosting.api.DatastorePb$Query

	at com.google.appengine.api.datastore.QueryTranslator.convertToPb(QueryTranslator.java:28)

	at com.google.appengine.api.datastore.PreparedQueryImpl.convertToPb(PreparedQueryImpl.java:181)

	at com.google.appengine.api.datastore.PreparedQueryImpl.runQuery(PreparedQueryImpl.java:134)

	at com.google.appengine.api.datastore.PreparedQueryImpl.asIterator(PreparedQueryImpl.java:66)

	at com.google.appengine.api.datastore.BasePreparedQuery$1.iterator(BasePreparedQuery.java:26)

	at org.vosao.dao.BaseDaoImpl.selectNotCache(BaseDaoImpl.java:278)

[Takashi Matsuo]

Hi Emanuele,

What is your app-id?

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[Emanuele Ziglioli]

I haven't deployed it. I'm seeing this error on the development server

[Takashi Matsuo]

Does cleaning the project solve the issue then?

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[Emanuele Ziglioli]

Hi Takashi,

I've deployed a non default version with SDK 1.7.1 and it's working on the production server. So this problem just affects the local environment

Cleaning the project doesn't seem to help

[Takashi Matsuo]

Hi Emanuele,

So, you are using vosao[1], right? Have you asked developers of vosao about this issue? I'm not saying it's an issue in vosao's side, but just in case.

I'd appreciate it if you could file an issue within our issue tracker with a minimal reproducible code if you found the issue is in our SDK.

Thanks

1. http://code.google.com/p/vosao/

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[Emanuele Ziglioli]

Vosao is no longer supported.

I'll see if I can create a small project with a reproducible problem.

All I know at this stage is that if I revert to the earlier 1.7.0 SDK the problem goes away.

Thanks,

Emanuele