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Sam Steingold wrote:
> what does the error "invalid tag argument" mean and how do I avoid it?
more information:
I use OCamlMPI (http://caml.inria.fr/cgi-bin/hump.en.cgi?contrib=401,
http://cristal.inria.fr/~xleroy/software.html#ocamlmpi).
the only tags that we pass around are "0" and "1".
alas, every now and then I see this in my logs:
"received tag=-32766 from rank=-32766"
(and a crash when I try to pass this invalid tag to the return message).
instead of the normal "received tag=0 from rank=0" for clients and
"received tag=0 from rank=<node_num>" for the server.
grep|sed|sort|uniq -c|sort:
14 received tag=-32766 from rank=-32766
17 received tag=0 from rank=4
49 received tag=0 from rank=88
59 received tag=0 from rank=59
60 received tag=0 from rank=149
75 received tag=0 from rank=5
93 received tag=0 from rank=72
101 received tag=0 from rank=89
108 received tag=0 from rank=113
110 received tag=0 from rank=14
110 received tag=0 from rank=90
112 received tag=0 from rank=133
125 received tag=0 from rank=137
141 received tag=0 from rank=62
159 received tag=0 from rank=104
163 received tag=0 from rank=134
164 received tag=0 from rank=170
167 received tag=0 from rank=109
168 received tag=0 from rank=22
171 received tag=0 from rank=177
178 received tag=0 from rank=71
184 received tag=0 from rank=187
186 received tag=0 from rank=92
188 received tag=0 from rank=186
195 received tag=0 from rank=45
196 received tag=0 from rank=180
197 received tag=0 from rank=54
204 received tag=0 from rank=164
208 received tag=0 from rank=110
211 received tag=0 from rank=70
214 received tag=0 from rank=139
221 received tag=0 from rank=91
225 received tag=0 from rank=50
226 received tag=0 from rank=78
228 received tag=0 from rank=116
229 received tag=0 from rank=123
229 received tag=0 from rank=84
230 received tag=0 from rank=160
230 received tag=0 from rank=42
231 received tag=0 from rank=67
232 received tag=0 from rank=141
232 received tag=0 from rank=95
233 received tag=0 from rank=68
238 received tag=0 from rank=2
240 received tag=0 from rank=1
240 received tag=0 from rank=106
245 received tag=0 from rank=51
247 received tag=0 from rank=165
247 received tag=0 from rank=188
247 received tag=0 from rank=26
247 received tag=0 from rank=32
249 received tag=0 from rank=183
252 received tag=0 from rank=93
256 received tag=0 from rank=128
260 received tag=0 from rank=77
263 received tag=0 from rank=100
263 received tag=0 from rank=179
264 received tag=0 from rank=131
269 received tag=0 from rank=125
269 received tag=0 from rank=174
269 received tag=0 from rank=28
273 received tag=0 from rank=152
274 received tag=0 from rank=25
276 received tag=0 from rank=176
276 received tag=0 from rank=86
277 received tag=0 from rank=148
277 received tag=0 from rank=3
277 received tag=0 from rank=44
278 received tag=0 from rank=153
279 received tag=0 from rank=87
282 received tag=0 from rank=48
283 received tag=0 from rank=175
285 received tag=0 from rank=126
292 received tag=0 from rank=98
294 received tag=0 from rank=17
295 received tag=0 from rank=173
296 received tag=0 from rank=8
298 received tag=0 from rank=129
299 received tag=0 from rank=118
299 received tag=0 from rank=163
300 received tag=0 from rank=132
302 received tag=0 from rank=107
302 received tag=0 from rank=85
304 received tag=0 from rank=18
306 received tag=0 from rank=16
307 received tag=0 from rank=120
307 received tag=0 from rank=127
308 received tag=0 from rank=105
309 received tag=0 from rank=150
310 received tag=0 from rank=130
310 received tag=0 from rank=52
312 received tag=0 from rank=178
312 received tag=0 from rank=66
313 received tag=0 from rank=39
317 received tag=0 from rank=115
318 received tag=0 from rank=74
319 received tag=0 from rank=56
320 received tag=0 from rank=161
320 received tag=0 from rank=34
320 received tag=0 from rank=64
321 received tag=0 from rank=49
322 received tag=0 from rank=145
323 received tag=0 from rank=114
325 received tag=0 from rank=69
325 received tag=0 from rank=73
326 received tag=0 from rank=13
326 received tag=0 from rank=167
326 received tag=0 from rank=181
326 received tag=0 from rank=182
326 received tag=0 from rank=30
328 received tag=0 from rank=81
329 received tag=0 from rank=101
329 received tag=0 from rank=79
331 received tag=0 from rank=124
333 received tag=0 from rank=162
335 received tag=0 from rank=23
336 received tag=0 from rank=75
340 received tag=0 from rank=156
340 received tag=0 from rank=58
342 received tag=0 from rank=121
343 received tag=0 from rank=35
344 received tag=0 from rank=166
346 received tag=0 from rank=185
350 received tag=0 from rank=103
351 received tag=0 from rank=40
355 received tag=0 from rank=117
356 received tag=0 from rank=99
357 received tag=0 from rank=122
358 received tag=0 from rank=184
360 received tag=0 from rank=83
361 received tag=0 from rank=6
366 received tag=0 from rank=143
366 received tag=0 from rank=31
367 received tag=0 from rank=111
367 received tag=0 from rank=135
367 received tag=0 from rank=24
370 received tag=0 from rank=20
370 received tag=0 from rank=53
375 received tag=0 from rank=102
375 received tag=0 from rank=169
376 received tag=0 from rank=171
381 received tag=0 from rank=112
381 received tag=0 from rank=80
382 received tag=0 from rank=146
382 received tag=0 from rank=46
383 received tag=0 from rank=65
385 received tag=0 from rank=97
386 received tag=0 from rank=168
390 received tag=0 from rank=37
390 received tag=0 from rank=76
393 received tag=0 from rank=119
393 received tag=0 from rank=151
393 received tag=0 from rank=159
396 received tag=0 from rank=154
398 received tag=0 from rank=60
399 received tag=0 from rank=57
400 received tag=0 from rank=19
400 received tag=0 from rank=9
405 received tag=0 from rank=142
405 received tag=0 from rank=147
409 received tag=0 from rank=10
409 received tag=0 from rank=41
411 received tag=0 from rank=55
415 received tag=0 from rank=15
415 received tag=0 from rank=82
418 received tag=0 from rank=11
419 received tag=0 from rank=172
420 received tag=0 from rank=36
421 received tag=0 from rank=38
422 received tag=0 from rank=63
424 received tag=0 from rank=108
426 received tag=0 from rank=158
428 received tag=0 from rank=7
435 received tag=0 from rank=12
437 received tag=0 from rank=33
442 received tag=0 from rank=144
443 received tag=0 from rank=29
443 received tag=0 from rank=94
445 received tag=0 from rank=138
452 received tag=0 from rank=43
455 received tag=0 from rank=61
456 received tag=0 from rank=21
463 received tag=0 from rank=136
477 received tag=0 from rank=140
478 received tag=0 from rank=27
484 received tag=0 from rank=47
495 received tag=0 from rank=96
497 received tag=0 from rank=157
512 received tag=0 from rank=155
57899 received tag=0 from rank=0
so, is there a better explanation than "network hardware noise generated
by gremlings"?
and what should I do?
request a retransmit?
I need to drop the current message, right?
how? (since the tag came corrupted, it is likely that the message is
corrupted too, so I cannot just read the expected number of bytes and
then drop them).
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