What causes "InvalidCacheLoadException CacheLoader returned null for key..."

[fwi...@adaptavist.com]

Hi,

Has anybody encountered an error such as "InvalidCacheLoadException CacheLoader returned null for key..." in com.google.common.cache.LocalCache$Segment.getAndRecordStats (LocalCache.java:2407)

This is while using pallet-jclouds with serverlove.

Any idea what causes this? Is this a bug?

This code was working a few weeks ago, but suddenly is not working.

Thanks,

Frank

Here's the stack trace:

com.google.common.cache.CacheLoader$InvalidCacheLoadException: CacheLoader returned null for key {SOME_KEY_REMOVED}.

at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2407)

at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2375)

at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2337)

at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2252)

at com.google.common.cache.LocalCache.get(LocalCache.java:3990)

at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3994)

at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4878)

at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4884)

at org.jclouds.elasticstack.compute.functions.ServerInfoToNodeMetadata$GetImageIdFromServer.apply(ServerInfoToNodeMetadata.java:168)

at org.jclouds.elasticstack.compute.functions.ServerInfoToNodeMetadata$GetImageIdFromServer.apply(ServerInfoToNodeMetadata.java:149)

at org.jclouds.elasticstack.compute.functions.ServerInfoToNodeMetadata.apply(ServerInfoToNodeMetadata.java:98)

at org.jclouds.elasticstack.compute.functions.ServerInfoToNodeMetadata.apply(ServerInfoToNodeMetadata.java:61)

at com.google.common.base.Functions$FunctionComposition.apply(Functions.java:209)

at com.google.common.collect.Iterators$9.transform(Iterators.java:893)

at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)

at com.google.common.collect.Iterators$8.computeNext(Iterators.java:735)

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.Sets.newLinkedHashSet(Sets.java:306)

at org.jclouds.compute.internal.BaseComputeService.listNodesDetailsMatching(BaseComputeService.java:360)

at org.jclouds.compute2$nodes_with_details.invoke(compute2.clj:124)

at pallet.compute.jclouds.JcloudsService.nodes(jclouds.clj:523)

at pallet.core$session_with_all_nodes.invoke(core.clj:1249)

at pallet.core$converge_STAR_.invoke(core.clj:1335)

at pallet.core$converge.doInvoke(core.clj:1506)

at clojure.lang.RestFn.invoke(RestFn.java:486)

at quickstart.groups.quickstart$nodes.invoke(quickstart.clj:67)

at quickstart.groups.quickstart$startup.invoke(quickstart.clj:78)

at user$eval8769.invoke(NO_SOURCE_FILE:1)

at clojure.lang.Compiler.eval(Compiler.java:6511)

at clojure.lang.Compiler.eval(Compiler.java:6477)

at clojure.core$eval.invoke(core.clj:2797)

at clojure.main$repl$read_eval_print__6405.invoke(main.clj:245)

at clojure.main$repl$fn__6410.invoke(main.clj:266)

at clojure.main$repl.doInvoke(main.clj:266)

at clojure.lang.RestFn.invoke(RestFn.java:1096)

at clojure.tools.nrepl.middleware.interruptible_eval$evaluate$fn__815.invoke(interruptible_eval.clj:56)

at clojure.lang.AFn.applyToHelper(AFn.java:159)

at clojure.lang.AFn.applyTo(AFn.java:151)

at clojure.core$apply.invoke(core.clj:601)

at clojure.core$with_bindings_STAR_.doInvoke(core.clj:1771)

at clojure.lang.RestFn.invoke(RestFn.java:425)

at clojure.tools.nrepl.middleware.interruptible_eval$evaluate.invoke(interruptible_eval.clj:41)

at clojure.tools.nrepl.middleware.interruptible_eval$interruptible_eval$fn__856$fn__858.invoke(interruptible_eval.clj:171)

at clojure.core$comp$fn__4034.invoke(core.clj:2278)

at clojure.tools.nrepl.middleware.interruptible_eval$run_next$fn__849.invoke(interruptible_eval.clj:138)

at clojure.lang.AFn.run(AFn.java:24)

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:722)