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http://www.openoffice.org/issues/show_bug.cgi?id=94471
Issue #|94471
Summary|soffice -accept=socket falls into an infinite loop wit
|h 100% CPU consumption
Component|framework
Version|OOO300m4
Platform|Unknown
URL|
OS/Version|All
Status|NEW
Status whiteboard|
Keywords|
Resolution|
Issue type|DEFECT
Priority|P3
Subcomponent|code
Assigned to|tm
Reported by|tora
------- Additional comments from [EMAIL PROTECTED] Tue Sep 30 11:45:56 +0000
2008 -------
This phenomenon might be well known since this has been observed with several
versions of OpenOffice.org, e.g. 2.3.1, 2.4.1, OOO300_m4, ...
Phenomenon
A process of soffice.bin becomes out-of-control with 100% CPU consumption.
Reproduction
There are several ways to reproduce this phenomenon:
a) soffice "-accept=socket,host=1.1.1.1,port=8100;urp;"
where the IP address does not belong to the machine.
b) soffice "-accept=socket,port=8100,tcpnodelay;urp;"
where 'tcpnodelay' should be followed by '=' and a number.
c) disabling DNS, which is required to solve an IP address of 'localhost,'
and then soffice "-accept=socket,port=8100;urp;"
Quick investigation
The following stack trace shows the phenomenon caused by the type c) above.
#0 osl_psz_createHostAddrByName (pszHostname="localhost") at
sal/osl/unx/socket.c
#1 osl_psz_resolveHostname (pszHostname="localhost") at
sal/osl/unx/socket.c
#2 osl_resolveHostname (ustrHostname) at
sal/osl/unx/socket.c
#3 SocketAddr (this=, strAddrOrHostName=, nPort=8100) at
solver/680/unxlngi6.pro/inc/osl/socket.hxx
#4 osl::SocketAddr::setHostname (this=, sDottedIpOrHostname=) at
solver/680/unxlngi6.pro/inc/osl/socket.hxx
#5 io_acceptor::SocketAcceptor::init (this=) at
io/source/acceptor/acc_socket.cxx
#6 io_acceptor::OAcceptor::accept (this=, sConnectionDescription=) at
io/source/acceptor/acceptor.cxx
#7 desktop::Acceptor::run (this=) at desktop/source/offacc/acceptor.cxx
#8 workerfunc (acc=) at desktop/source/offacc/acceptor.cxx
#9 osl_thread_start_Impl (pData=) at sal/osl/unx/thread.c
#10 start_thread () from /lib/libpthread.so.0
#11 clone () from /lib/libc.so.6
1. Calling gethostbyname() in the method osl_psz_createHostAddrByName() of the
file
sal/osl/unx/socket.c fails and returns 0 due to misconfiguration of the
resolver.
2. Consequently, the method io_acceptor::SocketAcceptor::init() in the file
io/source/acceptor/acc_socket.cxx throws an exception.
3. The exception will be caught in a while loop of the method Acceptor::run()
in the file desktop/source/offacc/acceptor.cxx
void SAL_CALL Acceptor::run()
{
while ( m_rAcceptor.is() && m_rBridgeFactory.is() )
{
RTL_LOGFILE_CONTEXT( aLog, "desktop (lo119109) Acceptor::run" );
try
{
...(omitted)...
// accept connection
Reference< XConnection > rConnection =
m_rAcceptor->accept( m_aConnectString );
...(omitted)...
} catch (Exception&) {
// connection failed...
// something went wrong during connection setup.
// just wait for a new connection to accept
}
}
}
4. Then, an attempt of 'accept connection' will be executed again in no time.
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