[google-appengine] Re: NoClassDefFoundError (org.eclipse.core.runtime.Platform)

[Syed Rizvi]

Hey Patrice,

I actually posted this 
<http://stackoverflow.com/questions/28984276/noclassdeffounderror-on-appengine-with-org-eclipse-core-runtime-platform>
 
on StackOverflow yesterday. Nothing helpful yet though. Will now report on 
the public issue tracker as you suggested.

Thank you!

On Wednesday, March 11, 2015 at 11:37:35 PM UTC+1, Patrice wrote:
>
> Hey Syed,
>
> This kind of question would be better suited for Stack Overflow 
> <http://www.stackoverflow.com>. If it's an actual defect, go on our public 
> issue tracker 
> <https://code.google.com/p/googleappengine/wiki/FilingIssues?tm=3> to 
> report it.
>
> Thank you!
>
> On Thursday, March 5, 2015 at 12:06:21 PM UTC-5, Syed Rizvi wrote:
>
> Hi,
> I am making a maven based GAE project. It's a service that is supposed to 
> serve some data to its clients. The project works perfectly on the local 
> machine, but gives the NoClassDefFoundError when deployed to GAE. Here's 
> the complete StackTrace:
>
> Error for /cron/loadDataset
> java.lang.NoClassDefFoundError: Could not initialize class 
> org.eclipse.core.runtime.Platform at 
> org.eclipse.ocl.common.OCLCommon.getPreference(OCLCommon.java:74 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2Fcommon%2FOCLCommon.java&line=74>
> ) at org.eclipse.ocl.lpg.AbstractBasicEnvironment.getValue(
> AbstractBasicEnvironment.java:440 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2Flpg%2FAbstractBasicEnvironment.java&line=440>
> ) at org.eclipse.ocl.options.ParsingOptions.getValue(
> ParsingOptions.java:330 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2Foptions%2FParsingOptions.java&line=330>
> ) at org.eclipse.ocl.AbstractEnvironment.createTypeChecker(
> AbstractEnvironment.java:1214 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2FAbstractEnvironment.java&line=1214>
> ) at org.eclipse.ocl.AbstractEnvironment.getTypeChecker(
> AbstractEnvironment.java:1196 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2FAbstractEnvironment.java&line=1196>
> ) at org.eclipse.ocl.AbstractEnvironment.getAdapter(
> AbstractEnvironment.java:1236 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2FAbstractEnvironment.java&line=1236>
> ) at org.eclipse.ocl.util.OCLUtil.getAdapter(OCLUtil.java:102 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2Futil%2FOCLUtil.java&line=102>
> ) at org.eclipse.ocl.util.TypeUtil.getTypeCheckerAdapter(TypeUtil.java:800 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2Futil%2FTypeUtil.java&line=800>
> ) at org.eclipse.ocl.util.TypeUtil.findAttribute(TypeUtil.java:171 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2Futil%2FTypeUtil.java&line=171>
> ) at org.eclipse.ocl.AbstractEnvironment.doLookupProperty(
> AbstractEnvironment.java:657 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2FAbstractEnvironment.java&line=657>
> ) at org.eclipse.ocl.AbstractEnvironment.lookupProperty(
> AbstractEnvironment.java:638 
> <https://console.developers.google.com/project/gaecommunitymashup/clouddev/source/resolve_location?appModule=default&appVersion=1×tampNanos=142556919357400&file=org%2Feclipse%2Focl%2FAbstractEnvironment.java&line=638>
> ) at org.eclipse.ocl.AbstractTypeResolver.findTupleType(
> AbstractTypeResolver.java:430 
> <http

[google-appengine] NoClassDefFoundError (org.eclipse.core.runtime.Platform)

[Syed Rizvi]

Hi,
I am making a maven based GAE project. It's a service that is supposed to 
serve some data to its clients. The project works perfectly on the local 
machine, but gives the NoClassDefFoundError when deployed to GAE. Here's 
the complete StackTrace:

Error for /cron/loadDataset
java.lang.NoClassDefFoundError: Could not initialize class 
org.eclipse.core.runtime.Platform at 
org.eclipse.ocl.common.OCLCommon.getPreference(OCLCommon.java:74 

) at org.eclipse.ocl.lpg.AbstractBasicEnvironment.getValue(
AbstractBasicEnvironment.java:440 

) at org.eclipse.ocl.options.ParsingOptions.getValue(ParsingOptions.java:330 

) at org.eclipse.ocl.AbstractEnvironment.createTypeChecker(
AbstractEnvironment.java:1214 

) at org.eclipse.ocl.AbstractEnvironment.getTypeChecker(
AbstractEnvironment.java:1196 

) at org.eclipse.ocl.AbstractEnvironment.getAdapter(
AbstractEnvironment.java:1236 

) at org.eclipse.ocl.util.OCLUtil.getAdapter(OCLUtil.java:102 

) at org.eclipse.ocl.util.TypeUtil.getTypeCheckerAdapter(TypeUtil.java:800 

) at org.eclipse.ocl.util.TypeUtil.findAttribute(TypeUtil.java:171 

) at org.eclipse.ocl.AbstractEnvironment.doLookupProperty(
AbstractEnvironment.java:657 

) at org.eclipse.ocl.AbstractEnvironment.lookupProperty(
AbstractEnvironment.java:638 

) at org.eclipse.ocl.AbstractTypeResolver.findTupleType(
AbstractTypeResolver.java:430 

) at org.eclipse.ocl.AbstractTypeResolver.resolveTupleType(
AbstractTypeResolver.java:382 

) at org.eclipse.ocl.AbstractTypeResolver$ResolveSwitch.caseTupleType(
AbstractTypeResolver.java:1008 

) at org.eclipse.ocl.types.util.TypesSwitch.doSwitch(TypesSwitch.java:267 

) at org.eclipse.ocl.types.util.T

[google-appengine] java.lang.NoClassDefFoundError after deployment to GAE

[Syed Rizvi]

Hi,

I have a web app that uses a cron job in the beginning to fetch data from a 
URL, works on it and serves to external clients. The project runs perfectly 
on the local machine without a single error but as soon as you deploy, the 
cron results in the following:
Uncaught exception from servlet java.lang.NoClassDefFoundError: Could not 
initialize class org.eclipse.core.runtime.Platform

There is only one external jar that I use in my project: 
*org.eclipselabs.emfjson_0.4.1.201207260839.jar*. Reason being that it is 
no more available on the public Maven repository. My POM looks like:

org.eclipselabs
emfjson
0.4.1
system

${project.build.directory}/war/WEB-INF/lib/org.eclipselabs.emfjson_0.4.1.201207260839.jar



All that I can imagine the error is somehow related to the fact that an 
external jar is being included in the project and when deployed, the server 
cannot find it. What can I do to get rid of this error? I've exhausted my 
Google search.

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[google-appengine] Re: Loading up data in the init() method

[Syed Rizvi]

Hi Vinny,

Sorry for the late response. I followed some suggestions of yours and have 
now decided to rather initialize the dataset as a cronjob since that allows 
more time for a job to be completed. Plus the dataset needs to be 
continuously updated from the source URL so I could schedule the cron for 
every X minutes or so.

Thanks!

On Thursday, February 19, 2015 at 3:00:12 PM UTC+1, Syed Rizvi wrote:
>
> Hi,
> I have a RESTful service that gets XML data from an external URL, does 
> some work on it and serves it to its clients. The dataset is initialized in 
> the init() method and takes > 1 minutes but less than 2 to be initialized 
> and is naturally supposed to be there before the first client request comes 
> in. This works on the local machine properly, but not when deployed to GAE.
>
> I get the DeadlineExceededException even though I have warmup requests 
> enabled: 
> true
> The URL fetch is not the culprit here since it takes average 10 seconds to 
> complete the fetch.
>
> What exactly am I missing? What would be the right way to do it? Here's 
> what the log says:
>
> javax.servlet.ServletContext log: unavailable 
> com.google.apphosting.api.DeadlineExceededException: This request 
> (4865075fa7d7c4db) started at 2015/02/19 13:38:24.019 UTC and was still 
> executing at 2015/02/19 13:39:23.816 UTC.
>

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[google-appengine] Re: Loading up data in the init() method

[Syed Rizvi]

Thanks for your response Vinny!

   1. I made a deliberate call to *_ah/warmup* which gives: "GET 
   /_ah/warmup HTTP/1.1" 200 0
   2. To *_ah/startup* which gives "GET /_ah/startup HTTP/1.1" 404 204
   
This is my first GAE project and I'm not a paid user yet so upgrading isn't 
currently an option nor increasing idle instances since not even a single 
instance is up yet. Cron isn't an option currently since the dataset has to 
be there to fulfill even the first request that comes in (but it can be 
later used when, let's say, I have to update the dataset regularly from the 
source).

I don't think that the warmup request solution may work for me because it 
says here 
<https://cloud.google.com/appengine/articles/deadlineexceedederrors>that: 
*Currently, 
the deadline for requests to frontend instances is 60 seconds. (Backend 
instances have no corresponding limit.) Every request, including warmup 
(request to /_ah/warmup) and loading requests ("loading_request=1" log 
header), is subject to this restriction. *Also see GAE issue reported here 
<https://code.google.com/p/googleappengine/issues/detail?id=7836>.

Do you have some suggestions? I'd be really glad to hear from you!

On Thursday, February 19, 2015 at 3:00:12 PM UTC+1, Syed Rizvi wrote:
>
> Hi,
> I have a RESTful service that gets XML data from an external URL, does 
> some work on it and serves it to its clients. The dataset is initialized in 
> the init() method and takes > 1 minutes but less than 2 to be initialized 
> and is naturally supposed to be there before the first client request comes 
> in. This works on the local machine properly, but not when deployed to GAE.
>
> I get the DeadlineExceededException even though I have warmup requests 
> enabled: 
> true
> The URL fetch is not the culprit here since it takes average 10 seconds to 
> complete the fetch.
>
> What exactly am I missing? What would be the right way to do it? Here's 
> what the log says:
>
> javax.servlet.ServletContext log: unavailable 
> com.google.apphosting.api.DeadlineExceededException: This request 
> (4865075fa7d7c4db) started at 2015/02/19 13:38:24.019 UTC and was still 
> executing at 2015/02/19 13:39:23.816 UTC.
>

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[google-appengine] Loading up data in the init() method

[Syed Rizvi]

Hi,
I have a RESTful service that gets XML data from an external URL, does some 
work on it and serves it to its clients. The dataset is initialized in the 
init() method and takes > 1 minutes but less than 2 to be initialized and 
is naturally supposed to be there before the first client request comes in. 
This works on the local machine properly, but not when deployed to GAE.

I get the DeadlineExceededException even though I have warmup requests 
enabled: 
true
The URL fetch is not the culprit here since it takes average 10 seconds to 
complete the fetch.

What exactly am I missing? What would be the right way to do it? Here's 
what the log says:

javax.servlet.ServletContext log: unavailable 
com.google.apphosting.api.DeadlineExceededException: This request 
(4865075fa7d7c4db) started at 2015/02/19 13:38:24.019 UTC and was still 
executing at 2015/02/19 13:39:23.816 UTC.

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