[jira] [Created] (KAFKA-5863) Potential null dereference in DistributedHerder#reconfigureConnector()

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created KAFKA-5863:
-----------------------------

             Summary: Potential null dereference in DistributedHerder#reconfigureConnector()
                 Key: KAFKA-5863
                 URL: https://issues.apache.org/jira/browse/KAFKA-5863
             Project: Kafka
          Issue Type: Bug
            Reporter: Ted Yu
            Priority: Minor


Here is the call chain:
{code}
                                RestServer.httpRequest(reconfigUrl, "POST", taskProps, null);
{code}
In httpRequest():
{code}
            } else if (responseCode >= 200 && responseCode < 300) {
                InputStream is = connection.getInputStream();
                T result = JSON_SERDE.readValue(is, responseFormat);
{code}
For readValue():
{code}
    public <T> T readValue(InputStream src, TypeReference valueTypeRef)
        throws IOException, JsonParseException, JsonMappingException
    {
        return (T) _readMapAndClose(_jsonFactory.createParser(src), _typeFactory.constructType(valueTypeRef));
{code}
Then there would be NPE in constructType():
{code}
    public JavaType constructType(TypeReference<?> typeRef)
    {
        // 19-Oct-2015, tatu: Simpler variant like so should work
        return _fromAny(null, typeRef.getType(), EMPTY_BINDINGS);
{code}



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