Objectify compatibility?

[stephanos]

Hey everyone,

we are just trying to run our Java application on AppScale and get this error on startup:

Feb 10, 2014 2:17:00 PM com.googlecode.objectify.cache.TriggerSuccessFuture trigger

WARNING: Future<?> threw an exception during trigger

java.util.concurrent.ExecutionException: java.lang.NullPointerException

at com.google.appengine.api.utils.FutureWrapper.setExceptionResult(FutureWrapper.java:63)

at com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:94)

at com.googlecode.objectify.cache.TriggerFuture.get(TriggerFuture.java:102)

at com.googlecode.objectify.impl.ResultAdapter.now(ResultAdapter.java:34)

at com.googlecode.objectify.impl.Round$2.now(Round.java:135)

at com.googlecode.objectify.impl.Round$2.now(Round.java:132)

at com.googlecode.objectify.impl.LoadEngine$1.nowUncached(LoadEngine.java:172)

at com.googlecode.objectify.impl.LoadEngine$1.nowUncached(LoadEngine.java:164)

at com.googlecode.objectify.util.ResultCache.now(ResultCache.java:30)

at com.googlecode.objectify.impl.Round$1.nowUncached(Round.java:73)

at com.googlecode.objectify.util.ResultCache.now(ResultCache.java:30)

at com.googlecode.objectify.LoadResult.now(LoadResult.java:25)

Do you have any hints as to what might lead to this?

(It works fine locally and on App Engine.)

Regards

Stephan

[stephanos]

oh, there's another one:

WARNING: Failed startup of context com.google.appengine.tools.development.DevAppEngineWebAppContext@69513ba9{/,/var/apps/my-app/app/war}

java.lang.NullPointerException

at com.google.storage.onestore.v3.OnestoreEntity$CompositeIndex.setAppId(OnestoreEntity.java:11505)

at com.google.appengine.api.datastore.dev.LocalDatastoreService.setupIndexes(Unknown Source)

at com.google.appengine.api.datastore.dev.LocalDatastoreService.init(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl.startServices(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl.access$000(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$1.run(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at com.google.appengine.tools.development.ApiProxyLocalImpl.getService(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(Unknown Source)

at java.util.concurrent.Executors$PrivilegedCallable$1.run(Executors.java:493)

at java.security.AccessController.doPrivileged(Native Method)

at java.util.concurrent.Executors$PrivilegedCallable.call(Executors.java:490)

at java.util.concurrent.FutureTask.run(FutureTask.java:262)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:744)

By the way, the app is deployed in App Engine with SDK 1.8.9.

[Navraj Chohan]

Hi Stephan,

Did you compile your app with the 1.8.0 GAE SDK? The tools will complain to you if the version is wrong. That is generally the reason for the null pointer exceptions you're seeing.

Thanks,

Raj

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r...@appscale.com

http://navrajchohan.com

[stephanos]

Hm, I just tried the 1.8.0 SDK. Same result.

There was no complaining about a wrong version, at least I didn't see one.

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[Navraj Chohan]

Hi Stephan

Can you send me a small app to reproduce the issue?

Thanks,

Raj

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[Glenn Molnar]

Hi Stephan,

Did you have any luck with this? I am getting the same stack trace.

INFO: Successfully processed /var/apps/ppq-uat/app/ppq-1.0-SNAPSHOT/WEB-INF/datastore-indexes.xml

Nov 12, 2014 5:03:38 AM com.google.appengine.tools.development.ApiProxyLocalImpl log

SEVERE: javax.servlet.ServletContext log: unavailable

java.lang.NullPointerException

at com.google.storage.onestore.v3.OnestoreEntity$CompositeIndex.setAppId(OnestoreEntity.java:11505)

at com.google.appengine.api.datastore.dev.LocalDatastoreService.setupIndexes(Unknown Source)

at com.google.appengine.api.datastore.dev.LocalDatastoreService.init(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl.startServices(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl.access$000(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$1.run(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at com.google.appengine.tools.development.ApiProxyLocalImpl.getService(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(Unknown Source)

at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(Unknown Source)

at java.util.concurrent.Executors$PrivilegedCallable$1.run(Executors.java:493)

at java.security.AccessController.doPrivileged(Native Method)

at java.util.concurrent.Executors$PrivilegedCallable.call(Executors.java:490)

at java.util.concurrent.FutureTask.run(FutureTask.java:262)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:744)

It would appear to be caused by something in my datastore-indexes.xml but I'm having trouble narrowing down what exactly.

Thanks

Glenn

[stephanos]

Sorry, we didn't investigate further and abandoned the whole thing.

[Navraj Chohan]

Hi Glenn,

These sorts of errors/exceptions generally happen when you have conflicting jars. Remove the appengine jars before uploading the app and you should see these weird errors go away.

AppScale will copy over the following jars (so make sure you're not uploading conflicting ones with your app):

appengine-api-1.0-sdk-1.8.0.jar
appengine-remote-api.jar  
appscale-smtp.jar
appengine-api-labs-1.8.0.jar    
appscale-activation.jar  
jsr107cache-1.1.jar
appengine-jsr107cache-1.8.0.jar  
appscale-mail.jar

You would find the application jars for a maven built project named guestbook here:
/var/apps/appscaleperformance/app/guestbook-1.0-SNAPSHOT/WEB-INF/lib#

In the future we'll see about automatically removing conflicting jars.

Thanks,

Raj

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Navraj Chohan (Raj), PhD
Co-Founder of AppScale Systems

A Google Cloud Partner,

Gartner 2014 Cool Vendor, 

[Navraj Chohan]

Sorry, that path should have been:

/var/apps/guestbook/app/guestbook-1.0-SNAPSHOT/WEB-INF/lib#

[Navraj Chohan]

I have a fix for removing conflicting jars here:

https://github.com/AppScale/appscale/pull/1639/files

Thanks,

Raj

[graziano obertelli]

Hi Stephanos,

sorry to hear that. As Raj mentioned we did figure out some of the weird
errors reported to us: in case you want to give it another shot, let me
know and I will be happy to walk through.

cheers,
graziano

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AppScale Systems Inc.

[Henry Tong]

Hi everyone,

We were getting a similar error as above after we have deployed our app:

WARNING: Failed startup of context com.google.appengine.tools.development.DevAppEngineWebAppContext@5fcd4f5d{/,/var/apps/myTestApp/app}
java.lang.NullPointerException
        at com.google.storage.onestore.v3.OnestoreEntity$CompositeIndex.setAppId(OnestoreEntity.java:11505)

We have done the following but still get the same error:
1. Compiled our code with 1.8.0 GAE SDK
2. Removed the conflicting jars as mentioned above
3. We are using the latest AppScale release 2.1.0 (looks like the fix mentioned above was in the release as well)

Is there anything else that we can do to get the app working?

Thanks a lot.
Henry

[Henry]

Hi everyone,

Just an update on our status. We have been able to get another App of ours to run on AppScale. 

We will continue to test and will report any new problem if we cannot resolve ourselves.

Thanks for the AppScale team's help!

Best regards,

Henry

[graziano obertelli]

Hello Henry,

thanks for the feedback and glad to hear all is well now!

cheers,
graziano

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AppScale Systems, Inc.

[Sam Martens]

Hi, 

I cannot get my app to be working:

If I keep the appengine-api-1.0-sdk-1.8.4.jar I get the following error:

SEVERE: javax.servlet.ServletContext log: unavailable

java.lang.NullPointerException

at com.google.storage.onestore.v3.OnestoreEntity$CompositeIndex.setAppId(OnestoreEntity.java:11876)

at com.google.appengine.api.datastore.dev.LocalDatastoreService.setupIndexes(Unknown Source)

at com.google.appengine.api.datastore.dev.LocalDatastoreService.init(Unknown Source)

If I remove the the appengine-api-1.0-sdk-1.8.4.jar I get the following error:

java.lang.NoClassDefFoundError: com/google/appengine/api/memcache/ErrorHandler

I was using GAE version 1.9.53 but changed my version to 1.8.4

PS: what do you mean with compiling the code with version 1.8.4? I use maven to build my application. I just changed the dependency on the appengine-api-1.0-sdk to 1.8.4. But when I build my app it will retrieve the latest SDK being 1.9.54.

Any help would be great

[Chris Donati]

Looking at your first stacktrace, it appears that the application ID was not retrieved properly when the AppServer started. Is `application` defined in your appengine-web.xml?

Maven should include the appengine-api-1.0-sdk-1.8.4.jar when you specify that version for the appengine-api-1.0-sdk dependency. Is it possible you have another dependency that's pulling in the 1.9.53 jar as well?

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[Sam Martens]

Hi Chris, 

My appengine-web.xml is very simple:

<?xml version="1.0" encoding="utf-8"?>

<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">

  <application>jamo-dev</application>

  <version>1</version>

  <threadsafe>true</threadsafe>

  <static-files>

    <include path="**.js" expiration="10m" />

  </static-files>

  <system-properties>

    <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>

    <property name="file.encoding" value="UTF-8" />

    <property name="DEFAULT_ENCODING" value="UTF-8" />

  </system-properties>

  <sessions-enabled>true</sessions-enabled>

   

  <manual-scaling>

<instances>1</instances>

  </manual-scaling>

</appengine-web-app>

I compile my code using maven where I have the following dependency:

<dependency>

            <groupId>com.google.appengine</groupId>

            <artifactId>appengine-api-1.0-sdk</artifactId>

            <version>1.8.4</version>

</dependency>

....

        

For some reason it always adds the latest version of the appengine-api-1.0-sdk (not even 1.9.53 that I had, but 1.9.54)

I then replaced this 1.9.54 with 1.8.4 and create a tar using tar --exclude='jamoAutomation.tar.gz' -czvf jamoAutomation.tar.gz * in the war folder.

That is what I then uploaded with the exceptions mentioned above. I also tried with removing the sdk, since I expected it to be provided within Appscale, but then I get NoClassDefFoundError.

I am running in the standard environment (NOT flexible).

Op vrijdag 28 juli 2017 04:40:35 UTC+2 schreef Chris Donati:

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[Chris Donati]

I haven't been able to reproduce the problem you are seeing on master. I would be happy to debug a sample app archive if you have one available that reproduces the problem (the NullPointerException during SetupIndexes). Just let me know what version of AppScale you are using.

Hi Chris, 

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[Arka Bandyopadhyay]

I have not used maven still getting the same error.

Hi Chris, 

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[chris....@appscale.com]

The NullPointerException was occurring because the datastore client was trying to check a property that had not been set yet. https://github.com/AppScale/appscale/pull/2547 should fix the issue.