This Cancel is not supposed to be happening, though the log before that looks normal.
The Cancel is probably from previous request. When I type also https://, there is no Cancel in the log. New failing log attached. The difference between http/https is the return value of ReadSegments: in http: ReadSegments returned [rv=0 read=391 sock-cond=0] ReadSegments returned [rv=0 read=0 sock-cond=0] in https: ReadSegments returned [rv=0 read=0 sock-cond=80470007] ReadSegments returned [rv=0 read=0 sock-cond=805a1f57] http: 6146[7951f0]: nsHttpConnection::Activate [this=1869c30 trans=189a570 caps=1] 6146[7951f0]: nsHttpTransaction::OnSocketStatus [this=189a570 status=804b0003 progress=0] 1024[6226d0]: sending status notification [this=1861e70 status=804b0003 progress=0/0] 6146[7951f0]: nsHttpTransaction::OnSocketStatus [this=189a570 status=804b0007 progress=0] 1024[6226d0]: sending status notification [this=1861e70 status=804b0007 progress=0/0] 6146[7951f0]: nsHttpTransaction::OnSocketStatus [this=189a570 status=804b0004 progress=0] 6146[7951f0]: nsHttpConnection::OnSocketWritable [this=1869c30] 1024[6226d0]: sending status notification [this=1861e70 status=804b0004 progress=0/0] 6146[7951f0]: writing transaction request stream 6146[7951f0]: nsHttpTransaction::OnSocketStatus [this=189a570 status=804b0005 progress=391] 6146[7951f0]: ReadSegments returned [rv=0 read=391 sock-cond=0] 6146[7951f0]: writing transaction request stream 6146[7951f0]: ReadSegments returned [rv=0 read=0 sock-cond=0] 6146[7951f0]: nsHttpTransaction::OnSocketStatus [this=189a570 status=804b000a progress=0] 1024[6226d0]: sending status notification [this=1861e70 status=804b000a progress=0/0] 6146[7951f0]: nsHttpConnection::OnSocketReadable [this=1869c30] https: 6146[ab55e0]: nsHttpConnection::Activate [this=17a75e0 trans=17d7ef0 caps=1] 6146[ab55e0]: nsHttpTransaction::OnSocketStatus [this=17d7ef0 status=804b0003 progress=0] 1024[6226d0]: sending status notification [this=17a04b0 status=804b0003 progress=0/0] 6146[ab55e0]: nsHttpTransaction::OnSocketStatus [this=17d7ef0 status=804b0007 progress=0] 1024[6226d0]: sending status notification [this=17a04b0 status=804b0007 progress=0/0] 1024[6226d0]: nsHttpHandler::Observe [topic="timer-callback"] 6146[ab55e0]: nsHttpTransaction::OnSocketStatus [this=17d7ef0 status=804b0004 progress=0] 6146[ab55e0]: nsHttpConnection::OnSocketWritable [this=17a75e0] 6146[ab55e0]: writing transaction request stream 1024[6226d0]: sending status notification [this=17a04b0 status=804b0004 progress=0/0] 6146[ab55e0]: ReadSegments returned [rv=0 read=0 sock-cond=80470007] 6146[ab55e0]: nsHttpConnectionMgr::OnMsgPruneDeadConnections 6146[ab55e0]: nsHttpConnection::OnSocketWritable [this=17a75e0] 6146[ab55e0]: writing transaction request stream 6146[ab55e0]: ReadSegments returned [rv=0 read=0 sock-cond=805a1f57] 6146[ab55e0]: nsHttpConnection::CloseTransaction[this=17a75e0 trans=17d7ef0 reason=805a1f57] 6146[ab55e0]: nsHttpTransaction::Close [this=17d7ef0 reason=805a1f57] 6146[ab55e0]: nsHttpConnectionMgr::ReclaimConnection [conn=17a75e0] 6146[ab55e0]: nsHttpConnection::Close [this=17a75e0 reason=805a1f57] 1024[6226d0]: nsHttpChannel::OnStartRequest [this=17a04b0 request=17d8560 status=805a1f57] 1024[6226d0]: nsHttpChannel::ProcessFallback [this=17a04b0] 1024[6226d0]: choosing not to fallback [0,,0] 1024[6226d0]: calling mListener->OnStartRequest
1024[6226d0]: Creating nsHttpHandler [this=aadc30]. 1024[6226d0]: nsHttpHandler::Init 1024[6226d0]: nsHttpHandler::PrefsChanged [pref=(null)] 1024[6226d0]: nsHttpAuthCache::Init 1024[6226d0]: Creating nsHttpConnectionMgr @aaf650 1024[6226d0]: nsHttpConnectionMgr::Init 1024[6226d0]: nsHttpHandler::StartPruneDeadConnectionsTimer 1024[6226d0]: nsHttpAuthCache::ClearAll 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::BuildUserAgent 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewChannel 1024[6226d0]: nsHttpHandler::NewProxiedChannel [proxyInfo=0] 1024[6226d0]: Creating nsHttpChannel @17a04b0 1024[6226d0]: nsHttpChannel::Init [this=17a04b0] 1024[6226d0]: host=buildd.debian.org port=-1 1024[6226d0]: uri=https://buildd.debian.org/ 1024[6226d0]: Creating nsHttpConnectionInfo @17a0460 1024[6226d0]: nsHttpChannel::AsyncOpen [this=17a04b0] 1024[6226d0]: nsHttpHandler::NotifyObservers [chan=17a04f8 event="http-on-modify-request"] 1024[6226d0]: nsHttpChannel::Connect [this=17a04b0] 1024[6226d0]: nsHttpChannel::OpenCacheEntry [this=17a04b0] 1024[6226d0]: got cache entry [access=2] 1024[6226d0]: nsHTTPChannel::CheckCache [this=17a04b0 entry=17b6b50] 1024[6226d0]: nsHttpChannel::AddAuthorizationHeaders? [this=17a04b0] 1024[6226d0]: nsHttpAuthCache::GetAuthEntryForPath [key=https://buildd.debian.org:443 path=/] 1024[6226d0]: nsHttpChannel::SetupTransaction [this=17a04b0] 1024[6226d0]: Creating nsHttpTransaction @17d7ef0 1024[6226d0]: nsHttpTransaction::Init [this=17d7ef0 caps=1] 1024[6226d0]: http request [ 1024[6226d0]: GET / HTTP/1.1 1024[6226d0]: Host: buildd.debian.org 1024[6226d0]: User-Agent: Mozilla/5.0 (X11; U; GNU/kFreeBSD x86_64; en-US; rv:1.9.1.3) Gecko/20090919 Iceweasel/3.5.3 (Debian-3.5.3-1) 1024[6226d0]: Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 1024[6226d0]: Accept-Language: en-us,en;q=0.5 1024[6226d0]: Accept-Encoding: gzip,deflate 1024[6226d0]: Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 1024[6226d0]: Keep-Alive: 300 1024[6226d0]: Connection: keep-alive 1024[6226d0]: ] 1024[6226d0]: nsHttpConnectionMgr::AddTransaction [trans=17d7ef0 0] 6146[ab55e0]: nsHttpConnectionMgr::OnMsgNewTransaction [trans=17d7ef0] 6146[ab55e0]: nsHttpConnectionMgr::GetConnection [ci=.S.buildd.debian.org:443 caps=1] 6146[ab55e0]: nsHttpConnectionMgr::AtActiveConnectionLimit [ci=.S.buildd.debian.org:443 caps=1] 6146[ab55e0]: total=0, persist=0 6146[ab55e0]: Creating nsHttpConnection @17a75e0 6146[ab55e0]: nsHttpConnection::Init [this=17a75e0] 6146[ab55e0]: nsHttpConnectionMgr::DispatchTransaction [ci=.S.buildd.debian.org:443 trans=17d7ef0 caps=1 conn=17a75e0] 6146[ab55e0]: nsHttpConnection::Activate [this=17a75e0 trans=17d7ef0 caps=1] 6146[ab55e0]: nsHttpTransaction::OnSocketStatus [this=17d7ef0 status=804b0003 progress=0] 1024[6226d0]: sending status notification [this=17a04b0 status=804b0003 progress=0/0] 6146[ab55e0]: nsHttpTransaction::OnSocketStatus [this=17d7ef0 status=804b0007 progress=0] 1024[6226d0]: sending status notification [this=17a04b0 status=804b0007 progress=0/0] 1024[6226d0]: nsHttpHandler::Observe [topic="timer-callback"] 6146[ab55e0]: nsHttpTransaction::OnSocketStatus [this=17d7ef0 status=804b0004 progress=0] 6146[ab55e0]: nsHttpConnection::OnSocketWritable [this=17a75e0] 6146[ab55e0]: writing transaction request stream 1024[6226d0]: sending status notification [this=17a04b0 status=804b0004 progress=0/0] 6146[ab55e0]: ReadSegments returned [rv=0 read=0 sock-cond=80470007] 6146[ab55e0]: nsHttpConnectionMgr::OnMsgPruneDeadConnections 6146[ab55e0]: nsHttpConnection::OnSocketWritable [this=17a75e0] 6146[ab55e0]: writing transaction request stream 6146[ab55e0]: ReadSegments returned [rv=0 read=0 sock-cond=805a1f57] 6146[ab55e0]: nsHttpConnection::CloseTransaction[this=17a75e0 trans=17d7ef0 reason=805a1f57] 6146[ab55e0]: nsHttpTransaction::Close [this=17d7ef0 reason=805a1f57] 6146[ab55e0]: nsHttpConnectionMgr::ReclaimConnection [conn=17a75e0] 6146[ab55e0]: nsHttpConnection::Close [this=17a75e0 reason=805a1f57] 1024[6226d0]: nsHttpChannel::OnStartRequest [this=17a04b0 request=17d8560 status=805a1f57] 1024[6226d0]: nsHttpChannel::ProcessFallback [this=17a04b0] 1024[6226d0]: choosing not to fallback [0,,0] 1024[6226d0]: calling mListener->OnStartRequest 1024[6226d0]: nsHttpChannel::OnStopRequest [this=17a04b0 request=17d8560 status=805a1f57] 1024[6226d0]: nsHttpTransaction::DeleteSelfOnConsumerThread [this=17d7ef0] 1024[6226d0]: Destroying nsHttpTransaction @17d7ef0 1024[6226d0]: nsHttpChannel::FinalizeCacheEntry [this=17a04b0] 1024[6226d0]: calling OnStopRequest 1024[6226d0]: nsHttpChannel::CloseCacheEntry [this=17a04b0] 1024[6226d0]: dooming cache entry!! 6146[ab55e0]: nsHttpConnectionMgr::OnMsgReclaimConnection [conn=17a75e0] 6146[ab55e0]: connection cannot be reused; closing connection 6146[ab55e0]: nsHttpConnection::Close [this=17a75e0 reason=80004004] 6146[ab55e0]: nsHttpConnectionMgr::OnMsgProcessPendingQ [ci=.S.buildd.debian.org:443] 6146[ab55e0]: nsHttpConnectionMgr::ProcessPendingQForEntry [ci=.S.buildd.debian.org:443] 6146[ab55e0]: nsHttpConnectionMgr::ProcessPendingQForEntry [ci=.S.buildd.debian.org:443] 6146[ab55e0]: Destroying nsHttpConnection @17a75e0 1024[6226d0]: nsHttpChannel::GetCacheKey [this=17a04b0] 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpHandler::NewURI 1024[6226d0]: nsHttpAuthCache::ClearAll 1024[6226d0]: nsHttpHandler::Observe [topic="profile-change-net-teardown"] 1024[6226d0]: nsHttpHandler::StopPruneDeadConnectionsTimer 1024[6226d0]: nsHttpAuthCache::ClearAll 1024[6226d0]: nsHttpConnectionMgr::Shutdown 12290[ab5090]: nsHttpConnectionMgr::OnMsgShutdown 1024[6226d0]: Destroying nsHttpChannel @17a04b0 1024[6226d0]: Destroying nsHttpConnectionInfo @17a0460 1024[6226d0]: nsHttpHandler::Observe [topic="xpcom-shutdown"] 1024[6226d0]: nsHttpHandler::StopPruneDeadConnectionsTimer 1024[6226d0]: nsHttpAuthCache::ClearAll 1024[6226d0]: nsHttpConnectionMgr::Shutdown 1024[6226d0]: Deleting nsHttpHandler [this=aadc30] 1024[6226d0]: nsHttpConnectionMgr::Shutdown 1024[6226d0]: Destroying nsHttpConnectionMgr @aaf650
