[jira] [Created] (IGNITE-5839) Unclear exception from BinaryObjectBuilder::build call when builder is reused

[Anton Vinogradov (Jira)]

Sergey Chugunov created IGNITE-5839:
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             Summary: Unclear exception from BinaryObjectBuilder::build call when builder is reused
                 Key: IGNITE-5839
                 URL: https://issues.apache.org/jira/browse/IGNITE-5839
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 2.1
            Reporter: Sergey Chugunov
             Fix For: 2.2


Simple test where {{BinaryObjectBuilder}} builder object is reused fails with exception {noformat}org.apache.ignite.binary.BinaryObjectException: Wrong value has been set [typeName=SimpleCls, fieldName=str, fieldType=String, assignedValueType=Object]{noformat}

{noformat}
        IgniteCache<Object, Object> cache = /* obtain a reference to withKeepBinary cache instance */;

        BinaryObjectBuilder bldr = grid(0).binary().builder("SimpleCls");

        bldr.setField("str", "abc");
        c.put(0, bldr.build());

        bldr.setField("str", null);
        c.put(1, bldr.build());

        bldr.setField("str", "def");
        c.put(2, bldr.build()); //exception will be thrown by call bldr.build()
{noformat}

It can be fixed by simply recreating BinaryObjectBuilder instead of reusing the same instance. However reusing builder object must be either explicitly prohibited or exception must be fixed.
Right now documentation on builder class says nothing about reusing this object.



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