pSessionID is a number starting at 0 and going to 64K-1, it just
identifies that particular session.
Andy
On Thu, 2 Jul 2015, John Gates wrote:
> I got a segmentation fault on a auto_ptr to a message object. I added the
> offending function (fails on return) below after the backtrace. This could
> well have something to with the expecting message size x, got 0 bytes
> problem. The core dump is too big to attach. If you want to see it, let me
> know where I can copy it.
>
> On a side note, why is Message::pSessionId always 1 or 0?
>
> -John
>
>
> #0 0x00007f29009c4ca6 in std::auto_ptr<XrdCl::Message>::~auto_ptr
> (this=0x7f28e2ffc9b0, __in_chrg=<optimized out>) at
> /usr/include/c++/4.8.2/backward/auto_ptr.h:170
> No locals.
> #1 0x00007f29009bd72e in XrdCl::XRootDMsgHandler::Process
> (this=0x7f28cc0046c0, msg=0x7f28dc000d30) at
> /afs/in2p3.fr/home/j/jgates/working/xrootd/src/XrdCl/XrdClXRootDMsgHandler.cc:297
> embededMsg = 0x7f28d4024eb0
> msgPtr = {_M_ptr = 0x7f28dc000d30}
> embRsp = 0x7f28d40165d0
> rsp = 0x7f28dc001950
> qryResult = {pHolder = 0x7f28e2ffcb58, pTypeInfo = 0x7f28e2ffcd00,
> pOwn = true}
> qryResponse = 0x7f28e2ffcb00
> log = 0x25d1c60
> req = 0x7f28cc03af00
> st = {status = 58336, code = 2483, errNo = 32553}
> #2 0x00007f29009acce5 in XrdCl::InQueue::AddMessage (this=0x7f28d8010380,
> msg=0x7f28dc000d30) at
> /afs/in2p3.fr/home/j/jgates/working/xrootd/src/XrdCl/XrdClInQueue.cc:65
> log = 0x25d1c60
> it = {first = , second = 1435863656}
> action = 5
> handler = 0x7f28cc0046c0
> #3 0x00007f2900999afd in XrdCl::Stream::QueueIncMsgJob::Run
> (this=0x7f28d800a520, arg=0x7f28dc000d30) at
> /afs/in2p3.fr/home/j/jgates/working/xrootd/src/./XrdCl/XrdClStream.hh:267
> msg = 0x7f28dc000d30
> #4 0x00007f29009f986a in XrdCl::JobManager::RunJobs (this=0x7f28e400e470) at
> /afs/in2p3.fr/home/j/jgates/working/xrootd/src/XrdCl/XrdClJobManager.cc:148
> h = {job = 0x7f28d800a520, arg = 0x7f28dc000d30}
> #5 0x00007f29009f93e4 in RunRunnerThread (arg=0x7f28e400e470) at
> /afs/in2p3.fr/home/j/jgates/working/xrootd/src/XrdCl/XrdClJobManager.cc:33
> mgr = 0x7f28e400e470
> #6 0x00007f2912c46df3 in start_thread () from /lib64/libpthread.so.0
> ---Type <return> to continue, or q <return> to quit---
> No symbol table info available.
> #7 0x00007f291226b1ed in clone () from /lib64/libc.so.6
> No symbol table info available.
>
>
>
>
> void XRootDMsgHandler::Process( Message *msg )
> {
> Log *log = DefaultEnv::GetLog();
>
> ServerResponse *rsp = (ServerResponse *)msg->GetBuffer();
> ClientRequest *req = (ClientRequest *)pRequest->GetBuffer();
>
> //--------------------------------------------------------------------------
> // We got an async message
> //--------------------------------------------------------------------------
> if( rsp->hdr.status == kXR_attn )
> {
> log->Dump( XRootDMsg, "[%s] Got an async response to message %s %s, "
> "processing it", pUrl.GetHostId().c_str(),
> msg->dump().c_str(), pRequest->GetDescription().c_str() );
> Message *embededMsg = new Message( rsp->hdr.dlen-8 );
> embededMsg->Append( msg->GetBuffer( 16 ), rsp->hdr.dlen-8 );
> XRDCL_SMART_PTR_T<Message> msgPtr( msg );
> pResponse = embededMsg; // this can never happen for oksofars
>
> // we need to unmarshall the header by hand
> XRootDTransport::UnMarshallHeader( embededMsg );
>
> //------------------------------------------------------------------------
> // Check if the dlen field of the embedded message is consistent with
> // the dlen value of the original message
> //------------------------------------------------------------------------
> ServerResponse *embRsp = (ServerResponse *)embededMsg->GetBuffer();
> if( embRsp->hdr.dlen != rsp->hdr.dlen-16 )
> {
> log->Error( XRootDMsg, "[%s] Sizes of the async response to %s and
> the "
> "embedded message are inconsistent. Expected %d, got
> %d.",
> pUrl.GetHostId().c_str(),
> pRequest->GetDescription().c_str(),
> rsp->hdr.dlen-16, embRsp->hdr.dlen);
>
> pStatus = Status( stFatal, errInvalidMessage );
> HandleResponse();
> return;
> }
>
> log->Dump( XRootDMsg, "[%s] async response to message %s -> Process",
> pUrl.GetHostId().c_str(), embededMsg->dump().c_str());
> Process( embededMsg );
> return;
> }
>
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