star hangs at pipe read

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Hi List,
I've got a problem with a server that uses star to backup to a tape=20
drive. Sometimes all goes well and star finishes, sometimes the two=20
processes hang indefinitely. From what I found out I think they don't=20
communicate with each other anymore through the pipes.

strace -p 31484
Process 31484 attached - interrupt to quit
read(5,  <unfinished ...>

strace -p 31498
Process 31498 attached - interrupt to quit
read(3,  <unfinished ...>

Did I understand it correctly that the 5 and 3 in the read lines refer=20
to the file descriptors (see below)?
As far as I see it both processes are now waiting for the other to write =

something into the pipes.
I dunno what the NODE value means and I also don't know how to debug it=20
any further.

Can someone shed some light on it or has a solution?
Thanks in advance!
Udo Puetz

relevant infos:

star -version
star: star 1.5a70 (x86_64-suse-linux)

TAPE=3D/dev/st0
export TAPE

/etc/default/star:
#STAR_FIFOSIZE=3D         32m
#STAR_FIFOSIZE_MAX=3D     100m

Both at default values then.

free:
              total       used       free     shared    buffers     cache=
d
Mem:       8233308    8143672      89636          0      25260    7771092=

-/+ buffers/cache:     347320    7885988
Swap:     16779884        140   16779744


ps ax:
31484 ?        SNL    7:56 star -c -lTSv <DIRECTORIES>
31498 ?        SN     4:37 star -c -lTSv <DIRECTORIES>

lsof -p 31484
COMMAND   PID USER   FD   TYPE  DEVICE SIZE       NODE NAME
[...]
star    31484 root    4w  FIFO    0,6           399933 pipe
star    31484 root    5r  FIFO    0,6           399934 pipe
star    31484 root    6u  unix 0xffff810164dff980 400690 socket


lsof -p 31498
COMMAND   PID USER   FD   TYPE  DEVICE SIZE       NODE NAME
[...]
star    31498 root    3r  FIFO    0,6           399933 pipe
star    31498 root    6w  FIFO    0,6           399934 pipe
star    31498 root    7u   CHR    9,0             4531 /dev/st0

--=20
Mit freundlichem Gruss

Udo P=FCtz
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		=09
visit us on the net ... http://www.i-nex.de
		=09


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