[jacorb-developer] DNS Query being madeduring Handshake even though I have disabled it in the configuration.

Alka Nand alka.nand at gmail.com
Thu May 23 18:34:34 CEST 2013 

Nick,

Thanks for the quick response.

Yes - it ONLY happens with SSL, TCP  handshake does not send a DNS query.

Here is the stack trace at the point that it sends it out

Daemon System Thread [RMI TCP Connection(3017)-172.28.128.207] (Suspended
(breakpoint at line 1061 in GIOPConnection))

                owns: EMSSession  (id=4706)


ClientGIOPConnection(GIOPConnection).sendMessage(MessageOutputStream, UtcT)
line: 1061


ClientGIOPConnection(GIOPConnection).sendRequest(MessageOutputStream,
boolean) line: 988

                ClientConnection.sendRequest(MessageOutputStream, boolean)
line: 309

                ClientConnection.sendRequest(MessageOutputStream,
ReplyPlaceholder, int, boolean) line: 290

                Delegate._invoke_internal(Object, OutputStream,
ReplyHandler, boolean) line: 1327

                Delegate.invoke_internal(Object, OutputStream,
ReplyHandler, boolean) line: 1152

                Delegate.invoke(Object, OutputStream) line: 1140

                Delegate.invokeBuiltin(Object, String, String) line: 2031

                Delegate.is_a(Object, String) line: 1894

                Reference(ObjectImpl)._is_a(String) line: 53

                NESessionFactory_IHelper.narrow(Object) line: 59

                EMSSession.establishSession() line: 817

                EMSSession.<init>(String, SessionManager, String, byte[],
String, ORB, POA, int) line: 457
                SessionManager.createNESession(String) line: 405

The Exception is

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err: 2013-05-23 11:15:46.189 SEVERE Underlying transport
connection closed due to errors during sendMessage(), in
ClientGIOPConnection to 172.28.136.191:1632 (1a6b67b)

ClientMessageReceptor0;Thu May 23 11:15:46 CDT 2013;System.err: 2013-05-23
11:15:46.190 FINE ClientGIOPConnection to 172.28.136.191:1632 (1a6b67b):
streamClosed()

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err: 2013-05-23 11:15:46.191 FINE ClientGIOPConnection to
172.28.136.191:1632 (1a6b67b): streamClosed()

ClientMessageReceptor0;Thu May 23 11:15:46 CDT 2013;System.err: 2013-05-23
11:15:46.192 FINE ClientGIOPConnection to 172.28.136.191:1632 (1a6b67b):
closeAllowReopen()

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err: 2013-05-23 11:15:46.193 FINE ClientGIOPConnection to
172.28.136.191:1632 (1a6b67b): closeAllowReopen()

ClientMessageReceptor0;Thu May 23 11:15:46 CDT 2013;System.err: 2013-05-23
11:15:46.200 INFO Client-side TCP transport to 172.28.136.191:1632 closed.

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err: 2013-05-23 11:15:46.200 WARNING Abnormal connection
termination. Lost 1 outstanding replie(s)!

ClientMessageReceptor0;Thu May 23 11:15:46 CDT 2013;System.err: 2013-05-23
11:15:46.201 FINE ClientGIOPConnection to 172.28.136.191:1632 (1a6b67b):
will wait until connected

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err: 2013-05-23 11:15:46.201 FINE invoke[-->]: SystemException

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.etf.ConnectionBase.to_COMM_FAILURE(ConnectionBase.java:152)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.iiop.IIOPConnection.handleCommFailure(IIOPConnection.java:79)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.etf.StreamConnectionBase.flush(StreamConnectionBase.java:228)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.giop.GIOPConnection.sendMessage(GIOPConnection.java:1062)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.giop.GIOPConnection.sendRequest(GIOPConnection.java:988)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.giop.ClientConnection.sendRequest(ClientConnection.java:309)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.giop.ClientConnection.sendRequest(ClientConnection.java:290)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.Delegate._invoke_internal(Delegate.java:1327)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.Delegate.invoke_internal(Delegate.java:1152)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:     org.jacorb.orb.Delegate.invoke(Delegate.java:1140)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.jacorb.orb.Delegate.invokeBuiltin(Delegate.java:2031)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:     org.jacorb.orb.Delegate.is_a(Delegate.java:1894)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
org.omg.CORBA.portable.ObjectImpl._is_a(ObjectImpl.java:53)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
com.tellabs.ems.sb_if.emsne.SessionMgr.NESessionFactory_IHelper.narrow(NESessionFactory_IHelper.java:59)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
com.tellabs.ems.idlneadapter.EMSSession.establishSession(EMSSession.java:817)

RMI TCP Connection(16)-172.28.128.207;Thu May 23 11:15:46 CDT
2013;System.err:
com.tellabs.ems.idlneadapter.EMSSession.<init>(EMSSession.java:457)

Thanks a bunch

alka


On Thu, May 23, 2013 at 9:43 AM, Nick Cross <jacorb at goots.org> wrote:

>
> Does this happen without SSL enabled? Do you have a test case?
>
> Regards
>
> Nick
>
>
>
> On 23/05/13 14:54, Alka Nand wrote:
>
>> Hi,
>>
>> I am using Jacorb 3.0. I saw that during SSL Handshake Jacorb is making a
>> DNS query even when I have turned off the following configuration
>> parameters
>>
>> # Use DNS names in IORs
>> jacorb.dns.enable=off
>> jacorb.dns.eager_resolve=off
>>
>> # Force the FQDN host name lookup. Turn off if exactly the given host
>> # names (e.g. "short" names) should be used in IORs
>> jacorb.dns.force_lookup=off
>>
>> The problem is if DNS is not setup corectly the DNS query takes 12 seconds
>> to timeout and in the meanwhile the server closes the connection.
>>
>> My question is why is the DNS query being made even though I have DNS
>> turned off?
>>
>> The sequence is
>> Time 0  - Client sends a "syn" to Server
>> Server responds with an "Syn Ack"
>> Client sends an "ack" back
>> Client then makes a DNS query to resolve the IP address - Standard Query -
>> reverse IPAdd.in-addr.arpa
>> 10 secs from time 0 the Server sends a Fin and closes the connection
>> 12 seconds later the DNS Query times out
>> Client then sends a "Client Helo" but the server has already closed the
>> connection
>> Alert
>>
>> Is there any other way of turning off DNS?
>>
>> Any response would be greatly appreciated.
>>
>> Thanks
>> alka nand
>> Tellabs
>>
>>
>


-- 

alka

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