Session error recovery

• US 6,963,996 B2
• Filed: 04/30/2002
• Issued: 11/08/2005
• Est. Priority Date: 04/30/2002
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Coughlin, Chesley B.
• Primary Examiner(s): Iqbal, Nadeem
• Assistant Examiner(s): Wilson, Yolanda L
• Application Number:
  US10/135,622
• Publication Number:
  US 20030204769A1
• Time in Patent Office: 1,288 Days
• Field of Search: 714/4, 714/10, 714/11, 714/15, 709/208
• US Class Current: 714/4.12
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06

Abstract

A method, apparatus, and system for restoring communications between network nodes. According to some embodiments, a request from a client device to a primary server device may be received at a session integrity proxy and stored. When an error associated with the primary server device is detected, it may be arranged for information associated with the request to be re-played to a secondary server device.

Claims

1. A method, comprising:

receiving, at a session integrity proxy, a first request sent from a client device to a primary server device;

storing, by the session integrity proxy, information associated with the first request;

receiving a first response sent from the primary server device to the client device;

receiving a second request sent from the client device to the primary server device;

storing, by the session integrity proxy, information associated with the second request;

detecting an error associated with the primary server device; and

subsequent to said detecting, sending the stored information associated with the first request to a secondary server device.

2. The method of claim 1, further comprising:

receiving a new first response from the secondary server device;

sending the stored information associated with the second request to the secondary server device; and

receiving a second response sent from the secondary server device to the client device.

3. The method of claim 2, further comprising:

storing information associated with at least one of the first response, the new first response, or the second response.

4. The method of claim 1, further comprising:

determining if the first request will be sent to the secondary server device.

5. The method of claim 1, further comprising:

determining if the information associated with at least one of the first or second requests will be stored.

6. The method of claim 5, wherein the determination is based at least in part on a list of types of requests to be stored.

7. The method of claim 1, further comprising:

removing the information associated with the first and second requests from a storage device when a session between the client device and the primary server device is completed.

8. The method of claim 1, wherein the first and second requests comprise requests from a plurality of client devices.

9. The method of claim 8, wherein the first and second requests comprise requests to a plurality of primary server devices.

10. An apparatus, comprising:

a memory; and

a processor communicating with the memory, the memory containing instructions which, when executed by the processor, cause the processor to;

receive a first request sent from a client device to a primary server device remote from the client device;

store information associated with the first request;

receive a first response sent from the primary server device to the client device;

receive a second request sent from the client device to the primary server device;

store information associated with the second request;

detect an error associated with the primary server device; and

subsequent to said detecting, send the information associated with the first request to a secondary server device remote from the client device.

11. The apparatus of claim 10, wherein execution of the instructions further cause the processor to:

receive a new first response from the secondary server device;

send the stored information associated with the second request to the secondary server divice and

receive a second response sent from the secondary server device to the client device.

12. The apparatus of claim 11, wherein execution of the instructions further cause the processor to:

store information associated with at least one of the first response, the new first response, or the second response.

13. The apparatus of claim 10, wherein execution of the instructions further cause the processor to:

determine if the information associated with at least one of the first or second requests will be stored.

14. The apparatus of claim 13, wherein the determination is based at least in part on a list of types of requests to be stored.

15. The apparatus of claim 10, wherein execution of the instructions further cause the processor to:

remove the information associated with at least one of the first or second requests from a storage device when a session between the client device and the primary server device is completed.

16. The apparatus of claim 10, wherein the first and second requests comprise requests from a plurality of client devices.

17. The apparatus of claim 10, wherein the first and second requests comprise requests to a plurality of primary server divices.

18. An article of manufacture comprising:

a computer readable medium having stored thereon instructions which, when executed by a processor, cause the processor to;

receive a first request sent from a client device to a primary server device remote from the client device;

store information associated with the first request;

receive a first response sent from the primary server device to the client device;

receive a second request sent from the client device to the primary server device;

store information associated with the second request;

detect an error associated with the primary server device; and

subsequent to said detecting, send the stored information associated with the first request to a secondary server device remote from the client device.

19. The article of claim 18, wherein execution of the instructions further cause the processor to:

receive a new first response from the secondary server device;

send the stored information associated with the second request to the secondary server device; and

receive a second response sent from the secondary server device to the client device.

20. The article of claim 19, wherein execution of the instructions further cause the processor to:

store information associated with at least one of the first response, the new first response, or the second response.

21. The article of claim 18, wherein execution of the instructions further cause the processor to:

determine if the information associated with at least one of the first and second requests will be stored.

22. The article of claim 21, wherein the determination is based at least in part on a list of types of requests to be stored.

23. The article of claim 18, wherein execution of the instructions further cause the processor to:

remove the information associated with the first and second requests from a storage device when a session between the client device and the primary server device is completed.

24. The article of claim 18, wherein the first and second requests comprise requests from a plurality of client devices.

25. The article of claim 18, wherein the first and second requests comprise requests to a plurality of primary server devices.

26. A system, comprising:

a memory;

a processor communicating with the memory, the memory containing instructions which, when executed by the processor, cause the processor to;

receive a first request sent from a Web client to a primary Web server;

store information associated with the first request;

receive a first response sent from the primary Web server to the Web client;

receive a second request sent from the Web client to the primary Web server;

store information associated with the second request;

detect an error associated with the primary Web server; and

subsequent to said detecting, send the information associated with the first request to a secondary Web server; and

a communication port adapted to communicate via the Internet.

27. The system of claim 26, wherein the first and second requests comprise information associated with a plurality of requests sent from the Web client to the primary Web server.

28. The system of claim 27, wherein the information associated with the plurality of request is sent to the secondary Web server.