Tomek Rękawek created OAK-8565:
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Summary: Using a lazy blob listing can cause Azure timeout
Key: OAK-8565
URL: https://issues.apache.org/jira/browse/OAK-8565
Project: Jackrabbit Oak
Issue Type: Bug
Components: segment-azure
Reporter: Tomek Rękawek
Fix For: 1.18.0
When trying to list the Azure blob in a lazy way, the API client loads the
listing in a few segments. If there's too much time between segment requests
(eg. because we're processing each blob), it can result in TimeoutException:
{noformat}
[FelixStartLevel] org.apache.jackrabbit.oak-segment-tar bundle
org.apache.jackrabbit.oak-segment-tar:1.16.0.R1864511
(144)[org.apache.jackrabbit.oak.segment.SegmentNodeStoreFactory(204)] : The
activate method has thrown an exception (java.util.NoSuchElementException: An
error occurred while enumerating the result, check the original exception for
details.)
java.util.NoSuchElementException: An error occurred while enumerating the
result, check the original exception for details.
at
com.microsoft.azure.storage.core.LazySegmentedIterator.hasNext(LazySegmentedIterator.java:113)
at java.base/java.util.Iterator.forEachRemaining(Iterator.java:132)
at
java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at
java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at
java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at
java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at
java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at
java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at
java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at
org.apache.jackrabbit.oak.segment.azure.AzureArchiveManager.renameTo(AzureArchiveManager.java:134)
[org.apache.jackrabbit.oak-segment-azure:1.16.0.R1864511]
at
org.apache.jackrabbit.oak.segment.file.tar.TarReader.backupSafely(TarReader.java:208)
[org.apache.jackrabbit.oak-segment-tar:1.16.0.R1864511]
at
org.apache.jackrabbit.oak.segment.file.tar.TarReader.collectFileEntries(TarReader.java:154)
[org.apache.jackrabbit.oak-segment-tar:1.16.0.R1864511]
at
org.apache.jackrabbit.oak.segment.file.tar.TarReader.open(TarReader.java:99)
[org.apache.jackrabbit.oak-segment-tar:1.16.0.R1864511]
at
org.apache.jackrabbit.oak.segment.file.tar.TarFiles.<init>(TarFiles.java:395)
[org.apache.jackrabbit.oak-segment-tar:1.16.0.R1864511]
...
Caused by: com.microsoft.azure.storage.StorageException: The client could not
finish the operation within specified maximum execution timeout.
at
com.microsoft.azure.storage.core.ExecutionEngine.setupStorageRequest(ExecutionEngine.java:277)
at
com.microsoft.azure.storage.core.ExecutionEngine.executeWithRetry(ExecutionEngine.java:95)
at
com.microsoft.azure.storage.core.LazySegmentedIterator.hasNext(LazySegmentedIterator.java:109)
... 58 common frames omitted
Caused by: java.util.concurrent.TimeoutException: The client could not finish
the operation within specified maximum execution timeout.
at
com.microsoft.azure.storage.core.ExecutionEngine.setupStorageRequest(ExecutionEngine.java:276)
... 60 common frames omitted
{noformat}
We should update the code to load all blobs into a list and return it.
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