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https://issues.apache.org/jira/browse/IGNITE-12625?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mikhail Petrov reassigned IGNITE-12625:
---------------------------------------
Assignee: Mikhail Petrov
> Thin client: Marshaling/unmarshaling of objects performed twice
> ---------------------------------------------------------------
>
> Key: IGNITE-12625
> URL: https://issues.apache.org/jira/browse/IGNITE-12625
> Project: Ignite
> Issue Type: Bug
> Components: binary, thin client
> Reporter: Aleksey Plekhanov
> Assignee: Mikhail Petrov
> Priority: Major
>
> For each thin client cache operation marshaling/unmarshaling of objects
> performed twice. For example, cache "put" operation marshal object on the
> client-side, then unmarshal object (with keep binaries) on the server-side
> and marshal it again before putting it to the cache. It causes some
> undesirable effects. For example, references to the same binary object in a
> collection ( {{new ArrayList(Arrays.asList(person, person))}} ) deserialized
> as different objects.
> Reproducer:
> {code:java}
> try (IgniteClient client = startClient()) {
> ClientCache<Integer, Object[]> cache =
> client.getOrCreateCache(DEFAULT_CACHE_NAME);
> Person person = new Person(0, "name");
> cache.put(0, new Object[] {person, person} );
> Object[] res = cache.get(0);
> assertTrue(res[0] == res[1]);
> }{code}
> Also, we need to unwrap binaries recursively since all objects inside
> collections, arrays and maps become binary objects after
> marshaling/unmarshalling (see IGNITE-12468)
> Also, we don't know do we really need to deserialize binary objects. If
> object was originally binary there is no evidence of this after
> marshaling/unmarshaling on server-side. This leads to problems when a binary
> object was created for unknown class.
> Reproducer:
> {code:java}
> cache.put(0, client.binary().builder("TestType").setField("test",
> "val").build());
> cache.get(0);{code}
> Will throw exception:
> {noformat}
> class org.apache.ignite.binary.BinaryInvalidTypeException: TestType
> at
> org.apache.ignite.internal.binary.BinaryContext.descriptorForTypeId(BinaryContext.java:762)
> at
> org.apache.ignite.internal.binary.BinaryReaderExImpl.deserialize0(BinaryReaderExImpl.java:1757)
> at
> org.apache.ignite.internal.binary.BinaryReaderExImpl.deserialize(BinaryReaderExImpl.java:1716)
> at
> org.apache.ignite.internal.binary.GridBinaryMarshaller.deserialize(GridBinaryMarshaller.java:319)
> at
> org.apache.ignite.internal.client.thin.ClientBinaryMarshaller.deserialize(ClientBinaryMarshaller.java:74)
> at
> org.apache.ignite.internal.client.thin.ClientUtils.unwrapBinary(ClientUtils.java:558)
> at
> org.apache.ignite.internal.client.thin.ClientUtils.readObject(ClientUtils.java:547){noformat}
> To avoid double marshaling we could pass byte array from request content to
> cache directly (for example using {{CacheObject}}), but we don't have object
> size in thin client protocol, so in any case, we need to traverse the
> objects. Also, we don't have the ability to get {{CacheObject}} from the
> cache now, so such an approach will only work in one way, for "put"
> operations, but not for "get" operations.
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