[Mono-list] Problem with worker threads
Elan Feingold
efeingold@mn.rr.com
Thu, 27 Feb 2003 12:15:29 -0600
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I'm seeing a lot of these messages (probably one per work task):
Unhandled Exception: System.NullReferenceException: A null value was
found where an object instance was required
in <0x00088> 00 .Worker:End ()
in <0x00068> 00 .Worker:Send ()
in <0x0005b> 01 System.MulticastDelegate:invoke_void ()
It looks nice and neat, but it's actually a SEGV:
#0 0x08454eec in ?? ()
#1 0x08454e3d in ?? ()
#2 0x083e82b8 in ?? ()
#3 0x080d6521 in start_wrapper (data=0x845f768) at threads.c:180
#4 0x081075de in timed_thread_start_routine (args=0x8455078) at
timed-thread.c:94
#5 0x400c5d0c in GC_start_routine (arg=0x8485440) at
linux_threads.c:1637
#6 0x40101941 in pthread_start_thread () from /lib/i686/libpthread.so.0
Any ideas?
-elan
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<div class=3DSection1>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>I’m seeing a lot of these messages (probably =
one per
work task):</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>Unhandled Exception: System.NullReferenceException: =
A null
value was found where an object instance was required</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>in <0x00088> 00 .Worker:End =
()</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>in <0x00068> 00 .Worker:Send =
()</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>in <0x0005b> 01 =
System.MulticastDelegate:invoke_void
()</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>It looks nice and neat, but it’s actually a =
SEGV:</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>#0 0x08454eec in ?? ()</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>#1 0x08454e3d in ?? ()</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>#2 0x083e82b8 in ?? ()</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>#3 0x080d6521 in start_wrapper =
(data=3D0x845f768) at
threads.c:180</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>#4 0x081075de in timed_thread_start_routine =
(args=3D0x8455078)
at timed-thread.c:94</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>#5 0x400c5d0c in GC_start_routine =
(arg=3D0x8485440) at
linux_threads.c:1637</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>#6 0x40101941 in pthread_start_thread () from
/lib/i686/libpthread.so.0</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>Any ideas?</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DGeorgia><span =
style=3D'font-size:10.0pt;
font-family:Georgia'>-elan</span></font></p>
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