Possible Issues With BizTalk Host -

in our biztalk environment, have specific hosts processing, receiving , sending. few days ago, saw following information message in event log.

the following biztalk host instance has initialized successfully.   biztalk host name: sendhost windows service name: btssvc$sendhost  

this message started happening @ 1:04:41 , shows every minute until 10:01:05 pm night. appears each time host initialized, have been queued send start sending. each minute, same data appears attempt send - there equal number of error messages in event log our various interfaces.

i'm wondering cause send host reinitialize every minute, , if happens again, how find out what's causing it. has seen type of behavior before? if so, how did resolve it?

** edit **

at 1:00:24 am, following error logged in application log

application: btsntsvc.exe framework version: v4.0.30319 description: process terminated due unhandled exception. exception info: system.runtime.callbackexception stack:    @ system.runtime.asyncresult.complete(boolean)    @ system.runtime.asyncresult.complete(boolean, system.exception)    @ system.servicemodel.channels.connectionstream+ioasyncresult.onasynciocomplete(system.object)    @ system.servicemodel.channels.socketconnection.finishread()    @ system.servicemodel.channels.socketconnection.onreceiveasync(system.object, system.net.sockets.socketasynceventargs)    @ system.servicemodel.channels.socketconnection.onreceiveasynccompleted(system.object, system.net.sockets.socketasynceventargs)    @ system.net.sockets.socketasynceventargs.oncompleted(system.net.sockets.socketasynceventargs)    @ system.net.sockets.socketasynceventargs.finishoperationsuccess(system.net.sockets.socketerror, int32, system.net.sockets.socketflags)    @ system.net.sockets.socketasynceventargs.completionportcallback(uint32, uint32, system.threading.nativeoverlapped*)    @ system.threading._iocompletioncallback.performiocompletioncallback(uint32, uint32, system.threading.nativeoverlapped*) 

and @ 1:00:24 following error logged

faulting application name: btsntsvc.exe, version: 3.11.158.0, time stamp: 0x538aea40 faulting module name: kernelbase.dll, version: 6.2.9200.16864, time stamp: 0x531d2be6 exception code: 0xe0434352 fault offset: 0x00010f22 faulting process id: 0x1f0c faulting application start time: 0x01d0603d63ff5bbe faulting application path: c:\program files (x86)\microsoft biztalk server 2013\btsntsvc.exe faulting module path: c:\windows\system32\kernelbase.dll report id: fd2a4f01-d2c4-11e4-9411-005056b5474a faulting package full name:  faulting package-relative application id:  

then @ 1:03:39 following information event logged:

fault bucket , type 0 event name: clr20r3 response: not available cab id: 0  problem signature: p1: btsntsvc.exe p2: 3.11.158.0 p3: 538aea40 p4: system.servicemodel p5: 4.0.30319.34230 p6: 53be5c02 p7: c6 p8: 152 p9: i0shpzewvqv4p1ujy40x15mqthf34rr5 p10:   attached files: c:\users\svc_btshost\appdata\local\temp\wer5ea7.tmp.appcompat.txt c:\users\svc_btshost\appdata\local\temp\wera73c.tmp.werinternalmetadata.xml c:\users\svc_btshost\appdata\local\temp\wera75c.tmp.hdmp c:\users\svc_btshost\appdata\local\temp\wer3885.tmp.mdmp  these files may available here: c:\programdata\microsoft\windows\wer\reportqueue   \appcrash_btsntsvc.exe_8592b3518472b55b77d4f91bb554882409312a0_cab_3c0d3d42  analysis symbol:  rechecking solution: 0 report id: fd2a4f01-d2c4-11e4-9411-005056b5474a report status: 4 

the next event logged @ 1:04:41 - host initializing successfully.

the above 2 error events , information event occur before sendhost initialized event next 21 hours

your host instance crashing due unhandled exception occurring in adapter you're using. due configuration error in adapter, or response server biztalk isn't expecting. seems it's bug in adapter.

see biztalk 2013 r2 - wc-custom adapter sap-binding: unhandeld (sic) exception on failure tests having similar issues sapbinding.