How to check if a socket is still alive and not closed by the server?

If I create a socket connection in Java, then is there any way to test whether that socket conecction is alive at any point of time. You may assume that the socket connection is never closed from my side ie. the client's end, however it may be closed by the server at any time.

The only way to tell if the socket has been disconnected is to send data over it.
set the timeout on the server side socket and then have the client check in every so often within the timeout so if you set the client to check in every 10 seconds then set the timeout to say 30 seconds on the server socket.
if the server socket times out then you know the connection has been broken.

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    Subject: How to tell embedded jinitator applet is still running when window closed
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    Subject: Re : How to tell embedded jinitator applet is still running when window closed
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    From: Oracle, mohammed pasha 07-Oct-05 09:55
    Subject: Re : How to tell embedded jinitator applet is still running when window closed
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    Subject: Re : How to tell embedded jinitator applet is still running when window closed
    Thank you for your reply and yes you did not understand my question fully.
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    From: Oracle, Evelene Raechel 10-Oct-05 06:45
    Subject: Re : How to tell embedded jinitator applet is still running when window closed
    Hi,
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    Regards,
    Rachel
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    Subject: Re : How to tell embedded jinitator applet is still running when window closed
    I'm sorry this is not helpful at all.
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    From: Oracle, Evelene Raechel 17-Oct-05 12:23
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    Closing thread.
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    available and that the firewall access is configured correctly. If the repository was temporarily unavailable, an incremental crawl will fix this error.   (0x80041200) 
     CHttpProbeHelper::ProbeServer: InitRequest failed for 'http://ppecpnew/_vti_bin/sitedata.asmx'. Return error to caller, hr=80041200  [stscommon.cxx:490]  d:\office\source\search\native\gather\protocols\common\stscommon.cxx 
    07/30/2014 01:32:26.06  mssdmn.exe (0x15CC)                      0x193C SharePoint Server Search       PHSts                        
     dvg0 High     STS3::COWSServer::InitializeClaimsCookie: Probing url 'http://pncvr' failed. Return error to caller, hr=80041200  [sts3util.cxx:1332]  d:\office\source\search\native\gather\protocols\sts3\sts3util.cxx 
    07/30/2014 01:32:26.06  mssdmn.exe (0x15CC)                      0x193C SharePoint Server Search       PHSts                        
     en0e High     CSTS3Accessor::InitURLType: Return error to caller, hr=80041200                 [sts3acc.cxx:2214]  d:\office\source\search\native\gather\protocols\sts3\sts3acc.cxx 
    07/30/2014 01:32:26.06  mssdmn.exe (0x15CC)                      0x193C SharePoint Server Search       PHSts                        
     dv3p High     CSTS3Accessor::GetServer fails, Url sts4://pnvpr/siteurl=sites/product/siteid={7ebfb072-08a8-4df7-8f74-e06730325d9a}/weburl=/webid={bd7ae724-1256-4b26-9633-416447d6bc5c}, hr=80041200  [sts3acc.cxx:185] 
    d:\office\source\search\native\gather\protocols\sts3\sts3acc.cxx 
    07/30/2014 01:32:26.06  mssdmn.exe (0x15CC)                      0x193C SharePoint Server Search       PHSts                        
     dvb1 High     CSTS3Accessor::Init fails, Url sts4:/mngbv/siteurl=sites/product/siteid={7ebfb072-08a8-4df7-8f74-e06730325d9a}/weburl=/webid={bd7ae724-1256-4b26-9633-416447d6bc5c}, hr=80041200  [sts3handler.cxx:312] 
    d:\office\source\search\native\gather\protocols\sts3\sts3handler.cxx 
    07/30/2014 01:32:26.06  mssdmn.exe (0x15CC)                      0x16FC SharePoint Server Search       HTTP Protocol
    Handler          du2z Verbose  CHttpProbeHelper::ProbeServer: Probing server with url 'http://pnvpr/_vti_bin/sitedata.asmx'.  [stscommon.cxx:476]  d:\office\source\search\native\gather\protocols\common\stscommon.cxx 
    07/30/2014 01:32:26.08  mssdmn.exe (0x15CC)                      0x193C SharePoint Server Search       PHSts                        
     dvb2 High     CSTS3Handler::CreateAccessorExD: Return error to caller, hr=80041200            [sts3handler.cxx:330]  d:\office\source\search\native\gather\protocols\sts3\sts3handler.cxx 
    07/30/2014 01:32:26.08  mssdmn.exe (0x15CC)                      0x16FC SharePoint Server Search       HTTP Protocol
    Handler          du4i Verbose  CHttpAccessorHelper::InitRequestInternal - opening request for '/_vti_bin/sitedata.asmx'.  [httpacchelper.cxx:353]  d:\office\source\search\native\gather\protocols\http\httpacchelper.cxx 
    earch application 'FAST Query SSA': Adding start address 'http://mnvfgext' for web application '64d562a1-535e-4917-8979-88840e2a67fe' to list of valid start addresses. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
    07/30/2014 01:32:46.53  OWSTIMER.EXE (0x28DC)                    0x1444 SharePoint Server Search       Administration               
     dmb6 Verbose  Ensure full read access to the indexing account 'ABC\sp_search' on web application 'http://nvpr/'. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
    07/30/2014 01:32:46.53  OWSTIMER.EXE (0x28DC)                    0x1444 SharePoint Server Search       Administration               
     dl2m Verbose  Search application 'FAST Query SSA': Skipping web application 'cea7b67b-fd5f-4c9a-a300-64a7d7ca3093' because its outbound url 'http://pnvpr' was automatically added once. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
    07/30/2014 01:32:46.53  OWSTIMER.EXE (0x28DC)                    0x1444 SharePoint Server Search       Administration               
     dl2n Verbose  Search application 'FAST Query SSA': Adding start address 'http://pnvpr' for web application 'cea7b67b-fd5f-4c9a-a300-64a7d7ca3093' to list of valid start addresses. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
    07/30/2014 01:32:46.53  OWSTIMER.EXE (0x28DC)                    0x1444 SharePoint Server Search       Administration               
     dl2k Verbose  web application 'http://abcrsp/' doesn't use search application 'FAST Query SSA', skipping it. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
    07/30/2014 01:32:46.53  OWSTIMER.EXE (0x28DC)                    0x1444 SharePoint Server Search       Administration               
     dl2k Verbose  web application 'http://excb/' doesn't use search application 'FAST Query SSA', ski
    Anil Loka

    Hi,
    According to your post, my understanding is that you got error when communicating to the server.
    This happens when crawler is not able to connect to the server. Make sure server name is correct. Couple of steps to troubleshoot it
    You should be able to ping the server from the server having crawl component. Make sure there is an entry for the server in the host file under c:\Windows\System32\drivers\etc folder.
              Ping <servername>
          2.  You should be able to connect to the server using telnet command
    Telnet< servername> <port number>
    More information:
    Troubleshooting of FAST Search Configuration
    If the issue still exists, you can delete the old search application and recreate from the beginning.
    You can also reset the index and do a full crawl after.
    Here is a similar thread for your reference:
    http://social.technet.microsoft.com/Forums/en-US/f3c61b53-304a-4c2a-a370-d0e573219d1d/an-unrecognized-http-response-was-received-when-attempting-to-crawl-this-item?forum=sharepointadminprevious
    Best Regards,
    Linda Li
    Linda Li
    TechNet Community Support

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