Aled Sage created JCLOUDS-1381:
----------------------------------

             Summary: NullPointerException provisioning VM in GCE: could not 
find image for disk
                 Key: JCLOUDS-1381
                 URL: https://issues.apache.org/jira/browse/JCLOUDS-1381
             Project: jclouds
          Issue Type: Bug
          Components: jclouds-compute
    Affects Versions: 2.0.2
            Reporter: Aled Sage


Using jclouds 2.0.2, when attempting to provision a VM in GCE it failed with 
the exception shown below. However, my retry immediately after this did succeed.

{noformat}
com.google.common.util.concurrent.UncheckedExecutionException: 
java.util.concurrent.ExecutionException: could not find image for disk 
https://www.googleapis.com/compute/v1/projects/cloudsoft-qa/zones/europe-west1-b/disks/qa-kubernetes-xlgv2n5qsb-312:
 null
 at 
com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4832)
 at 
org.jclouds.googlecomputeengine.compute.functions.InstanceToNodeMetadata.apply(InstanceToNodeMetadata.java:80)
 at 
org.jclouds.googlecomputeengine.compute.functions.InstanceToNodeMetadata.apply(InstanceToNodeMetadata.java:44)
 at 
com.google.common.base.Functions$FunctionComposition.apply(Functions.java:216)
 at com.google.common.collect.Iterators$8.transform(Iterators.java:799)
 at 
com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
 at com.google.common.collect.Iterators$7.computeNext(Iterators.java:651)
 at 
com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
 at 
com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
 at com.google.common.collect.Iterators.indexOf(Iterators.java:776)
 at com.google.common.collect.Iterators.any(Iterators.java:684)
 at com.google.common.collect.Iterables.any(Iterables.java:623)
 at 
org.jclouds.compute.strategy.impl.CreateNodesWithGroupEncodedIntoNameThenAddToSet.getNextNames(CreateNodesWithGroupEncodedIntoNameThenAddToSet.java:199)
 at 
org.jclouds.compute.strategy.impl.CreateNodesWithGroupEncodedIntoNameThenAddToSet.execute(CreateNodesWithGroupEncodedIntoNameThenAddToSet.java:123)
 at 
org.jclouds.googlecomputeengine.compute.strategy.CreateNodesWithGroupEncodedIntoNameThenAddToSet.execute(CreateNodesWithGroupEncodedIntoNameThenAddToSet.java:130)
 at 
org.jclouds.compute.internal.BaseComputeService.createNodesInGroup(BaseComputeService.java:217)
 at 
org.apache.brooklyn.location.jclouds.JcloudsLocation.obtainOnce(JcloudsLocation.java:756)
 at 
org.apache.brooklyn.location.jclouds.JcloudsLocation.obtain(JcloudsLocation.java:614)
 at 
org.apache.brooklyn.entity.software.base.lifecycle.MachineLifecycleEffectorTasks$ObtainLocationTask.call(MachineLifecycleEffectorTasks.java:451)
 at 
org.apache.brooklyn.entity.software.base.lifecycle.MachineLifecycleEffectorTasks$ObtainLocationTask.call(MachineLifecycleEffectorTasks.java:440)
 at org.apache.brooklyn.util.core.task.Tasks.withBlockingDetails(Tasks.java:113)
 at 
org.apache.brooklyn.entity.software.base.lifecycle.MachineLifecycleEffectorTasks$ProvisionMachineTask.call(MachineLifecycleEffectorTasks.java:421)
 at 
org.apache.brooklyn.entity.software.base.lifecycle.MachineLifecycleEffectorTasks$ProvisionMachineTask.call(MachineLifecycleEffectorTasks.java:396)
 at 
org.apache.brooklyn.util.core.task.DynamicSequentialTask$DstJob.call(DynamicSequentialTask.java:364)
 at 
org.apache.brooklyn.util.core.task.BasicExecutionManager$SubmissionCallable.call(BasicExecutionManager.java:565)
 at java.util.concurrent.FutureTask.run(FutureTask.java:266)
 at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
 at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
 at java.lang.Thread.run(Thread.java:748)

Caused by: java.util.concurrent.ExecutionException: could not find image for 
disk 
https://www.googleapis.com/compute/v1/projects/cloudsoft-qa/zones/europe-west1-b/disks/qa-kubernetes-xlgv2n5qsb-312:
 null
 at 
org.jclouds.googlecomputeengine.compute.loaders.DiskURIToImage.load(DiskURIToImage.java:53)
 at 
org.jclouds.googlecomputeengine.compute.loaders.DiskURIToImage.load(DiskURIToImage.java:33)
 at 
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
 at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)
 at 
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)
 at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)
 at com.google.common.cache.LocalCache.get(LocalCache.java:3937)
 at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941)
 at 
com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824)
 at 
com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4830)
 ... 28 more

Caused by: java.lang.NullPointerException
 at 
org.jclouds.googlecomputeengine.compute.loaders.DiskURIToImage.load(DiskURIToImage.java:49)
 ... 37 more
{noformat}

Prior to that error, the log showed:
{noformat}
2018-02-14T03:55:46.381Z : 
\{"timeMillis":1518580546373,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"org.jclouds.rest.internal.InvokeHttpMethod","message":">>
 invoking 
Disks:get","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.382Z : 
\{"timeMillis":1518580546376,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":">>
 Accept: 
application/json","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.382Z : 
\{"timeMillis":1518580546376,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":">>
 Authorization: Bearer 
<snip>","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.677Z : 
\{"timeMillis":1518580546677,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"org.jclouds.http.internal.JavaUrlHttpCommandExecutorService","message":"Receiving
 response -414675134: HTTP/1.1 404 Not 
Found","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.678Z : 
\{"timeMillis":1518580546678,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 HTTP/1.1 404 Not 
Found","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.680Z : 
\{"timeMillis":1518580546679,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 Server: 
GSE","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.680Z : 
\{"timeMillis":1518580546680,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 Accept-Ranges: 
none","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.680Z : 
\{"timeMillis":1518580546680,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 X-Content-Type-Options: 
nosniff","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.680Z : 
\{"timeMillis":1518580546681,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 X-Frame-Options: 
SAMEORIGIN","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.681Z : 
\{"timeMillis":1518580546681,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 Vary: 
Origin,Accept-Encoding","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.681Z : 
\{"timeMillis":1518580546681,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 Vary: 
X-Origin","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.691Z : 
\{"timeMillis":1518580546682,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 Cache-Control: private, 
max-age=0","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.693Z : 
\{"timeMillis":1518580546682,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 Content-Type: application/json; 
charset=UTF-8","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
2018-02-14T03:55:46.693Z : 
\{"timeMillis":1518580546683,"thread":"brooklyn-execmanager-y6R1SdqQ-52","level":"DEBUG","loggerName":"jclouds.headers","message":"<<
 Expires: Wed Feb 14 03:55:46 GMT 
2018","endOfBatch":false,"loggerFqcn":"org.ops4j.pax.logging.slf4j.Slf4jLogger","threadId":195,"threadPriority":5}
{noformat}

Not that 4 VMs were being provisioned at approximately the same time (only one 
per call to \{{createNodesInGroup}}).

We should guard against 
\{{org.jclouds.googlecomputeengine.compute.functions.Resources.disk(key)}} 
returning null when called in \{{DiskURIToImage.load(key)}}. The load method 
returns an \{{Optional<Image>}} anyway, so should be easy to change.



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