transmission.cgi using 100% cpu

**wengi** · 04-05-2008, 17:35

Hi there,

i installed my WL-HDD from the scratch with the -9 firmware.
Setup is exactly as in my HowTo (see sig).

I (and several other users) have the problem that the transmission.cgi is hanging when listing the torrents. At this point it consumes 100% cpu.
The attached picture shows this behaviour in the browser.
This are the running processes:

Code:

[admin@blechbuechse torrent]$ ps axf
  PID TTY      STAT   TIME COMMAND
    1 ?        S      0:02 /sbin/init
    2 ?        S      0:00 [keventd]
    3 ?        SN     0:00 [ksoftirqd_CPU0]
    4 ?        S      0:00 [kswapd]
    5 ?        S      0:00 [bdflush]
    6 ?        S      0:00 [kupdated]
    7 ?        S      0:01 [mtdblockd]
   46 ?        S      0:00 telnetd
   51 ?        S      0:01 httpd
   56 ?        S      0:00 klogd
   57 ?        S      0:00 [khubd]
   67 ?        Ss     0:02 watchdog
   69 ?        Ss     0:00  \_ ntp
   78 ?        S      0:00 dropbear
  396 ?        Ss     0:05  \_ dropbear
  397 pts/0    Ss     0:03      \_ -sh
  569 pts/0    R+     0:00          \_ ps axf
   90 ?        S      0:00 [kjournald]
   91 ?        S      0:00 [kjournald]
  117 ?        S      0:00 /sbin/syslogd -m 0 -O /opt/var/log/messages.log -S -l 6 -s 0
  123 ?        Ss     0:00 /opt/sbin/cron
  132 ?        Ss     0:00 /opt/sbin/xinetd -pidfile /var/run/xinetd.pid
  142 ?        Ss     0:05  \_ nmbd
  551 ?        Ss     0:05  \_ [smbd]
  141 ?        S      0:00 /usr/sbin/busybox_httpd -c /opt/etc/httpd.conf -p 8008 -h /opt/share/www
  555 ?        S      0:00  \_ /usr/sbin/busybox_httpd -c /opt/etc/httpd.conf -p 8008 -h /opt/share/www
  556 ?        S      0:00      \_ /bin/sh /opt/share/www/cgi-bin/transmission.cgi
  568 ?        R      0:08          \_ /bin/sh /opt/share/www/cgi-bin/transmission.cgi
  293 ?        Ss     0:00 transmissiond -p 65534 -w 300 -u 41 -d 180 -i /opt/var/run/transmission.pid /tmp/harddisk/torrent/active-torrents.txt
  296 ?        S      0:00  \_ transmissiond -p 65534 -w 300 -u 41 -d 180 -i /opt/var/run/transmission.pid /tmp/harddisk/torrent/active-torrents.txt
  297 ?        R      2:06      \_ transmissiond -p 65534 -w 300 -u 41 -d 180 -i /opt/var/run/transmission.pid /tmp/harddisk/torrent/active-torrents.txt

- I am using busybox-httpd.
- I also tried to change the paths in transmission.conf to /tmp/mnt/disc0_3/torrent (maybe the symlink...)
- I upgraded to Version 1.11+r5740-1

...but nothing worked.
The only way to stop transmission.cgi is to kill the process within console.

transmissiond is working fine ans downloads are as always

Any ideas?

wengi

**wengi** · 08-05-2008, 12:56

Noone?

wengi

**raas** · 08-05-2008, 13:14

Hi wengi,

just following up on this 'cause we've discussed this in another thread.

Have you tried lighttpd to run the transmission.cgi ?
Maybe the problem is not with the transmission.cgi, but in the way it runs in busybox-httpd

**wengi** · 08-05-2008, 13:35

i changed to lightttpd today.

Status page is ok but pushing a torrent hangs.
I have no idea how to set cgi (perl?, shell?). That is one of my biggest probs atm.

I think i will have to try thttpd within the next days....

wengi

**L3rd** · 29-05-2008, 20:23

Hi, I have the same problem.
Maybe this info can help a little more:
If I click on "Update" with 2 torrent running, I get the web interface frozen.
Than from the console:

Code:

[admin@WL-HDD root]$ ps axf
  PID TTY      STAT   TIME COMMAND
    1 ?        S      0:03 /sbin/init
    2 ?        S      0:00 [keventd]
    3 ?        RN     0:36 [ksoftirqd_CPU0]
    4 ?        S      0:53 [kswapd]
    5 ?        S      0:00 [bdflush]
    6 ?        S      0:00 [kupdated]
    7 ?        S      0:27 [mtdblockd]
   45 ?        S      0:00 telnetd
   57 ?        S      0:00 klogd
   60 ?        S      0:00 [khubd]
   67 ?        Ss     4:10 watchdog
   69 ?        Ss     0:01  \_ ntp
   76 ?        S      0:01 dropbear
 8970 ?        Ss     0:02  \_ dropbear
 8996 pts/0    Ss     0:00      \_ -sh
 9060 pts/0    R+     0:00          \_ ps axf
   93 ?        S      0:00 [kjournald]
   94 ?        S      0:32 [kjournald]
   96 ?        Ss     4:43 /usr/sbin/nmbd -D
   98 ?        Ss     0:00 /usr/sbin/smbd -D
 8205 ?        S      0:05  \_ /usr/sbin/smbd -D
  125 ?        S      1:03 /sbin/syslogd -m 0 -O /opt/var/log/syslog.log -S -l 7 -s 0
  130 ?        Ss     0:01 /opt/sbin/cron
  139 ?        S      0:01 /usr/sbin/busybox_httpd -c /opt/etc/httpd.conf -p 8008 -h /opt/share/www
 9040 ?        S      0:00  \_ /usr/sbin/busybox_httpd -c /opt/etc/httpd.conf -p 8008 -h /opt/share/www
 9041 ?        S      0:00      \_ /bin/sh /opt/share/www/cgi-bin/transmission.cgi
 9059 ?        R      0:02          \_ /bin/sh /opt/share/www/cgi-bin/transmission.cgi
  203 ?        SNs    0:05 transmissiond -p 65534 --nat-traversal -e -w 300 -u 10 -d -1 -i /opt/var/run/transmission.pid /tmp/harddisk/torrent/active-torrents.txt
  206 ?        SN     0:00  \_ transmissiond -p 65534 --nat-traversal -e -w 300 -u 10 -d -1 -i /opt/var/run/transmission.pid /tmp/harddisk/torrent/active-torrents.txt
  207 ?        RN   205:15      \_ transmissiond -p 65534 --nat-traversal -e -w 300 -u 10 -d -1 -i /opt/var/run/transmission.pid /tmp/harddisk/torrent/active-torrents.txt
  212 ?        S      1:06 httpd

No if I kill the latest "transmission.cgi":

Code:

[admin@WL-HDD root]$ kill 9059

the web interface will show one row more, I repet the procedure one more time and the web interface i fully loaded:

For me it seams that everytime "transmission.cgi" is "looking" to an active or finished torrent it get stuck..

**wengi** · 30-05-2008, 07:29

Yep, same behaviour here.

wengi

**oleo** · 30-05-2008, 08:07

I do not have such behaviour. And transmission.cgi was not changed for some time. So, could you please try

Code:

sh -x /opt/share/www/cgi-bin/transmission.cgi

to see where it stops. It could be some external tool that freezes.

**wengi** · 30-05-2008, 09:10

Hi oleo,

thanks for your reply.
i attached the result of your request.

The normal call of transmission.cgi is working well at the moment, so you will not see any problems in the attachment.

The cgi hangs when i try to push a torrent from queued to active.
Is there a shell command for this push request?

wengi

**oleo** · 30-05-2008, 09:57

Try this:

Code:

QUERY_STRING='ACTION=Push&ID=21' sh -x /opt/share/www/cgi-bin/transmission.cgi

ID is the line number.

**wengi** · 30-05-2008, 10:48

Hi,

i now did a

Code:

sh  /opt/share/www/cgi-bin/transmission.cgi

And saw this part:

Code:

<table>
<thead><tr><td></td><td>Queued</td><td>status</td></tr>
</thead><tbody>
<tr><td><input name=ID value=1 type=radio></td>
<td>OOo_2.4.0_Win32Intel_install_de.exe</td>
</tbody></table>

So i did a

Code:

QUERY_STRING='ACTION=Push&ID=1' sh -x /opt/share/www/cgi-bin/transmission.cgi

I hope this is the right command to push the torrrent with ID 1 from q to a.

It stopped here:

Code:

+ echo OOo_2.4.0_Win32Intel_install_de.exe</td>
OOo_2.4.0_Win32Intel_install_de.exe</td>
+ [ -f /tmp/mnt/disc0_3/torrent/work/OOo_2.4.0_Win32Intel_install_de.exe/.info ]
+ echo <td><div style='position:relative;'>
<td><div style='position:relative;'>
+ [ Active = Seeding -o Active = Active ]
+ [ -f /tmp/mnt/disc0_3/torrent/work/OOo_2.4.0_Win32Intel_install_de.exe/.status ]
+ STATUS=status not available
+ echo <div style='position:relative;'>status not available
<div style='position:relative;'>status not available
+ echo  Start: 30 May 11:28
 Start: 30 May 11:28
+ [ -n  ]

The full file is attached.

Opening a second shell and doing a list shows that torrent ID1 is now active. But the first shell is still hanging in transmission.cgi (since more than 15 mins).
CPU usage of transmission.cgi (process "sh") is 100%.

wengi

**oleo** · 30-05-2008, 12:40

It stops at the following:

Code:

 echo "<div style='position:relative;'>${STATUS}"
                echo " Start: ${STARTTIME}"
                [ -n "${ENDTIME}" ] && echo " End: ${ENDTIME}"
                [ -n "${SCRAPE}" ] && echo " ${SCRAPE}"

And I do not see problem here. So it must be elsewhere.
Try to replace interpreter in first line

Code:

#!/bin/sh

with

Code:

#!/opt/bin/busybox sh

after you installed busybox-base packages.
Or maybe bash.

**wengi** · 30-05-2008, 14:04

Strange.

i installed the three busybox 1.10.2 packages and rebooted.
busybox 1.10.2 is now used as default.

Pushing the torrent several times via shell wa allways fine.
Trying to push the torrent via local lynx ends in hang up.
Pushing via IE or FF over a ssh tunnel works fine now....

I have no idea what is going on but i will test some torrents with the new busybox version.

thanks for now
wengi

EDIT: Modifiying transmission.cgi as you recommended doesn't make a difference (tested).

**wengi** · 03-06-2008, 07:24

After some time of testing i can report the following:

installing ipkg-busybox does the trick.
Everything works fine except for the local installed lynx browser.
Lynx still hangs on pushing torrents.

Maybe this is something with core-/fileutils replacing the orig. busybox commands in the new firmware and diffs in the coding (german umlaute äüö and other special chars)

But this seems to be an acceptable workaround.

Thanks oleo

wengi

**L3rd** · 03-06-2008, 07:35

It is working also for me.
You install the busybox package and replace the interpreter in the first line of transmission.cgi as advised by Oleo.
Thanks!!

**oleo** · 03-06-2008, 08:20

It would be nice if someone can isolate a problem or maybe ask Oleg to upgrade stock busybox. But then, maybe the problem is with old uClibc 0.9.19 use in Oleg firmware and just upgrading would help. Again Oleg is endpoint address.

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