steve@cdp.UUCP (02/17/91)
This bug report is addressed primarily to Interactive Support, in particular, Marty C. Stewart, Support Team Leader. ........................................................... BUG REPORT ========== I. Summary The problem with tcp/ip connections hanging in CLOSED state, and accepting no more connections on a particular tcp port continues in recent versions of interactive UNIX and interactive TCP/IP. The bug was reported many times in this group. Interactive's SSU.41a TCP/IP patch decreased the frequency of the bug. II. Hardware/software I run Interactive UNIX Release 2.2.1 with the SSU.41a tcp/ip patch. Machine has a mylex MWS-20 motherboard, adaptek 1542B disk controller, and Western Digital 16 bit Ethercard Plus. III. Description of problem Ocasionally it becomes impossible to 'rcp' to the UNIX host. rcp requests return with a timeout error message. A reboot solves the problem. IV. Detail I try the following from the machine cdp.igc.org : rcp /tmp/steve sf.igc.org:/tmp/steve It returns the error condition : sf.igc.org: Connection timed out Other network services, such as telnet and ftp continue to work fine. 'netstat -a' on sf.igc.org indicates that 'shell' is stuck in CLOSED state : Active Internet connections (including servers) Proto Recv-Q Send-Q Local Address Foreign Address (state) tcp 0 0 sf.igc.org.login cdp.igc.org.1023 ESTABLISHED tcp 0 5120 sf.igc.org.shell cdp.igc.org.1023 CLOSED tcp 0 0 *.time *.* LISTEN tcp 0 0 *.daytime *.* LISTEN tcp 0 0 *.chargen *.* LISTEN tcp 0 0 *.discard *.* LISTEN tcp 0 0 *.echo *.* LISTEN tcp 0 0 *.exec *.* LISTEN tcp 0 0 *.login *.* LISTEN tcp 0 0 *.shell *.* LISTEN tcp 0 0 *.telnet *.* LISTEN tcp 0 0 *.ftp *.* LISTEN tcp 0 0 *.* *.* CLOSED udp 0 0 *.3131 *.* udp 0 0 *.1025 *.* udp 0 0 *.1024 *.* udp 0 0 *.syslog *.* udp 0 0 *.* *.* 'ps -ef' on sf.igc.org shows that there are no unusual network-related processes : UID PID PPID C STIME TTY TIME COMMAND root 72 1 0 Feb 13 ? 10:47 netsched root 74 1 0 Feb 13 ? 0:00 /etc/netd root 85 1 0 Feb 13 ? 3:17 /etc/rwhod root 87 1 0 Feb 13 ? 0:45 /etc/syslogd root 84 1 0 Feb 13 ? 0:03 /etc/inetd root 6385 84 10 12:14:45 ? 0:01 rlogind A reboot returns 'rcp' to a working state for a few days. V. Resolution I am happy to assist interactive's support and engineering staffs in any way practical, to repair the bug. Could you please give me some information : 1. Is this a new or standing bug report ? 2. What is the schedule for fixing it ? I'm fine with, "we don't consider this an important bug, and so it may not be fixed for many months." I would not be well served by an no acknowledgement or an ambiguous answer. Thank you for the service, Steven Fram Technical Director Institute for Global Communications (IGC) steve@igc.org cdp!steve
nealpo@b1.ism.isc.com (Neal Pollack) (02/18/91)
In article <654400017@cdp> steve@cdp.UUCP writes: > >The problem with tcp/ip connections hanging in CLOSED state, >and accepting no more connections on a particular tcp port > >Could you please give me some information : > The tcp closed socket problem *is* currently being addressed, and is a logged bug. It has been replicated in house, and is being worked on. Disclaimer: I am not part of support or development, so please do not drown me with mail. I am simply posting this to assure you that we are listening, and are working on it at a high priority. Sincerely, Neal Pollack