Bug 164195
| Summary: | During boot time, portmapper crashes when remote clients contact the portmapper at a rate faster than 4 times per second. | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 3 | Reporter: | Charles Whalen <whalen> |
| Component: | portmap | Assignee: | Steve Dickson <steved> |
| Status: | CLOSED DUPLICATE | QA Contact: | Jay Turner <jturner> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 3.0 | CC: | srevivo |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-07-26 14:30:13 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.3) Gecko/20050104 Red Hat/1.4.3-3.0.7 Description of problem: During boot time, portmapper crashes when remote clients contact the portmapper at a rate faster than 4 times per second. While initiating many rpcinfo -p host requests, the portmapper appears to answer to first few requests, then hangs. From netstat, I see many half open connections. (See below). I can reproduce this by running a script many times in parallel. (See below) The problem was noticed when ypbind service was trying to start. I worked around this problem by using IPTABLES and block all remote client connections to port 111. Thank You Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Run many copies of script in additional inforamtion field 2. Reboot computer 3. Watch system hang at ypbind service startup. Can not contact portmapper. Additional info: #!/bin/csh set x = 0 while ( $x <1000 ) rpcinfo -p HOST & set x = `expr $x + 1` usleep 100000 end Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:32768 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:32769 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:513 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:514 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:111 127.0.0.1:32775 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:905 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:901 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:903 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:902 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:32776 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:934 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:938 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:951 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:914 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:909 SYN_RECV tcp 0 0 127.0.0.1:111 127.0.0.1:32777 SYN_RECV