Aleksey Plekhanov created IGNITE-10680:
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Summary: Add the ability to use started kernel context in
standalone WAL iterator
Key: IGNITE-10680
URL: https://issues.apache.org/jira/browse/IGNITE-10680
Project: Ignite
Issue Type: Improvement
Affects Versions: 2.7
Reporter: Aleksey Plekhanov
Assignee: Aleksey Plekhanov
Fix For: 2.8
In the current implementation it's only possible to use fake kernel context in
standalone WAL iterator. If we need to use binary meta from the running Ignite
node we must specify binary meta directory in parameters of standalone WAL
iterator factory. But there is a possible race with binary meta files
read/write since binary meta received with {{MetadataUpdateProposedMessage}}
can be written to the file and concurrently read from the same file at the same
time. This can lead to assertions like the following:
{noformat}
java.lang.AssertionError
at
org.apache.ignite.internal.binary.GridBinaryMarshaller.deserialize(GridBinaryMarshaller.java:305)
at
org.apache.ignite.internal.binary.BinaryMarshaller.unmarshal0(BinaryMarshaller.java:121)
at
org.apache.ignite.marshaller.AbstractNodeNameAwareMarshaller.unmarshal(AbstractNodeNameAwareMarshaller.java:94)
at
org.apache.ignite.internal.util.IgniteUtils.unmarshal(IgniteUtils.java:10103)
at
org.apache.ignite.internal.processors.cache.binary.BinaryMetadataFileStore.restoreMetadata(BinaryMetadataFileStore.java:117)
at
org.apache.ignite.internal.processors.cache.binary.CacheObjectBinaryProcessorImpl.start(CacheObjectBinaryProcessorImpl.java:251)
at
org.apache.ignite.internal.processors.cache.persistence.wal.reader.StandaloneGridKernalContext.binaryProcessor(StandaloneGridKernalContext.java:180)
at
org.apache.ignite.internal.processors.cache.persistence.wal.reader.StandaloneGridKernalContext.<init>(StandaloneGridKernalContext.java:155)
at
org.apache.ignite.internal.processors.cache.persistence.wal.reader.IgniteWalIteratorFactory.prepareSharedCtx(IgniteWalIteratorFactory.java:359)
at
org.apache.ignite.internal.processors.cache.persistence.wal.reader.IgniteWalIteratorFactory.iterator(IgniteWalIteratorFactory.java:177)
{noformat}
To solve this we can use in standalone WAL iterator existing kernel context of
the started node instead of creating new fake one.
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