What is the T3 Protocol in WebLogic Server (WLS)? [ID 887300.1] 5

T3 is Oracle WebLogic Server’s proprietary RMI protocol. Basically, t3 protocol is a protocol that sits on top of Java RMI. There is some documentation available.

RMI communications in WebLogic Server use the T3 protocol to transport data between WebLogic Server and other Java programs, including clients and other WebLogic Server instances.

If you need to control T3 access through a firewall, you may use the protocol filter “T3”.



Determining Connection Availability in Cluster

Any two Java programs with a valid T3 connection—such as two server instances, or a server instance and a Java client—use periodic point-to-point “heartbeats” to announce and determine continued availability. Each end point periodically issues a heartbeat to the peer, and similarly, determines that the peer is still available based on continued receipt of heartbeats from the peer.

The frequency with which a server instance issues heartbeats is determined by the heartbeat interval, which by default is 60 seconds.

The number of missed heartbeats from a peer that a server instance waits before deciding the peer is unavailable is determined by the heartbeat period, which by default, is 4. Hence, each server instance waits up to 240 seconds, or 4 minutes, with no messages—either heartbeats or other communication—from a peer before deciding that the peer is unreachable.

Changing timeout defaults is not recommended.



5 thoughts on “What is the T3 Protocol in WebLogic Server (WLS)? [ID 887300.1]

  1. Reply Nit Sep 14,2010 10:36 am

    I want to buy this champ…but some issues i have herad about it like it doesnot play MP4 videos and also not able to install java applications.it is so? Give me answerplz:)

    • Reply anuj_tomar Sep 14,2010 8:03 pm

      it will play MP4 vedio with resolution upto 240*320. try using alok video splitter or format factory(Free) to convert videos in resolution of 240*320. High resolution videos will not play.
      Also installing java is bit tricky on samsung phones. You have only two options:
      1) You can install any java software online. go to the link where jar file is located and install .. easy one.
      2) To install offline like directly using jar file to install as in Nokia that is tricky.
      watch http://www.youtube.com/watch?v=P3ne0gW3fdE

      • Reply Prasadblj Dec 4,2010 8:56 am

        Hey anuj,

        the samsung champ mobile support only 176/144 dimensions mp4 files.it’s not supported 240*320. i used same tool i.e alok video splitter or format factory(Free).

        • Reply Anuj Singh Tomar Dec 16,2010 4:38 pm

          Ohh thankx Prasad for the info .. but the small screen will compensate for the poor resolution .. anyways dont know from where i got that piece of info .. my samsung star can play videos upto 240*320

  2. Reply garthethan Jul 5,2011 1:36 pm

    The Samsung Champ C330 mobile phone is conceivably one of the a lot of affordable touchscreen handset. The Samsung Champ C330 buzz aswell can records up to an hour of video with complete in QCIF resolution at 15fps.

    Samsung c3300

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