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Message boards : Problems and Help : Scheduler request failed: Couldn't connect to server

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Profile TimTProject donor
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Joined: 2 Dec 11
Posts: 437
ID: 121414
Credit: 1,527,733,977
RAC: 641,266
Discovered 5 mega primesFound 4 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 12 primes in the 2020 Tour de PrimesFound 3 primes in the 2021 Tour de PrimesFound 1 prime in the 2021 Tour de Primes Mountain Stage321 LLR Sapphire: Earned 20,000,000 credits (21,415,573)Cullen LLR Sapphire: Earned 20,000,000 credits (21,023,197)ESP LLR Sapphire: Earned 20,000,000 credits (21,937,716)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,542,115)PPS LLR Emerald: Earned 50,000,000 credits (53,085,204)PSP LLR Sapphire: Earned 20,000,000 credits (22,003,717)SoB LLR Sapphire: Earned 20,000,000 credits (20,586,237)SR5 LLR Sapphire: Earned 20,000,000 credits (21,053,783)SGS LLR Sapphire: Earned 20,000,000 credits (20,927,235)TRP LLR Sapphire: Earned 20,000,000 credits (20,495,653)Woodall LLR Sapphire: Earned 20,000,000 credits (25,444,348)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (23,450,078)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (74,346)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,184,525)PPS Sieve Double Gold: Earned 500,000,000 credits (572,940,608)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (287,513)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,074,848)AP 26/27 Double Bronze: Earned 100,000,000 credits (108,603,066)WW Emerald: Earned 50,000,000 credits (92,444,000)GFN Double Silver: Earned 200,000,000 credits (378,152,421)PSA Emerald: Earned 50,000,000 credits (72,018,672)
Message 137856 - Posted: 14 Feb 2020 | 3:32:53 UTC

One of my machines suddenly started behaving strangely yesterday and I have not been able to figure out the issue. I'm hoping someone else here might have some suggestions...

This is a long time running machine on the same network with my other computers, it will run several tasks, then start failing to upload or download new ones. it seems to sit in this state until I hit 'project update' in the boinc manager, then it connects, grabs a new set of workunits and crunches away. after a round (or several) of workunits, it will get hung again.

Here's a relevant section of the boinc log showing some working connections leading to the failure:

3538 2/13/2020 5:59:59 PM [http_xfer] [ID#527] HTTP: wrote 34 bytes 3539 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#527] Info: Connection #682 to host www.primegrid.com left intact 3540 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: HTTP/1.1 200 OK 3541 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: Date: Thu, 13 Feb 2020 22:59:59 GMT 3542 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: Server: Apache/2.4.25 (Debian) 3543 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: Content-Length: 34 3544 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: Content-Type: text/plain;charset=UTF-8 3545 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: 3546 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: 1000000000:P:1:2:257 3547 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Received header from server: 3589 1565458 3548 2/13/2020 5:59:59 PM [http_xfer] [ID#528] HTTP: wrote 34 bytes 3549 PrimeGrid 2/13/2020 5:59:59 PM [http] [ID#528] Info: Connection #683 to host www.primegrid.com left intact 3550 PrimeGrid 2/13/2020 6:00:00 PM [file_xfer] http op done; retval 0 (Success) 3551 PrimeGrid 2/13/2020 6:00:00 PM [file_xfer] http op done; retval 0 (Success) 3552 PrimeGrid 2/13/2020 6:00:00 PM [file_xfer] file transfer status 0 (Success) 3553 PrimeGrid 2/13/2020 6:00:00 PM Finished download of llrPPSE_332530205 3554 PrimeGrid 2/13/2020 6:00:00 PM [file_xfer] Throughput 103 bytes/sec 3555 PrimeGrid 2/13/2020 6:00:00 PM [file_xfer] file transfer status 0 (Success) 3556 PrimeGrid 2/13/2020 6:00:00 PM Finished download of llrPPSE_332530070 3557 PrimeGrid 2/13/2020 6:00:00 PM [file_xfer] Throughput 103 bytes/sec 3558 PrimeGrid 2/13/2020 6:00:00 PM Starting task llrPPSE_332530205_1 3559 PrimeGrid 2/13/2020 6:00:00 PM Starting task llrPPSE_332530070_0 3560 PrimeGrid 2/13/2020 6:03:10 PM Computation for task genefer16_31776850_1 finished 3561 PrimeGrid 2/13/2020 6:03:12 PM [fxd] starting upload, upload_offset 0 3562 PrimeGrid 2/13/2020 6:03:12 PM [http] HTTP_OP::libcurl_exec(): ca-bundle 'C:\Program Files\BOINC\ca-bundle.crt' 3563 PrimeGrid 2/13/2020 6:03:12 PM [http] HTTP_OP::libcurl_exec(): ca-bundle set 3564 PrimeGrid 2/13/2020 6:03:12 PM Started upload of genefer16_31776850_1_r1286889301_0 3565 PrimeGrid 2/13/2020 6:03:12 PM [file_xfer] URL: http://www.primegrid.com/cgi/file_upload_handler 3566 PrimeGrid 2/13/2020 6:03:13 PM [http] [ID#529] Info: Connection 682 seems to be dead! 3567 PrimeGrid 2/13/2020 6:03:13 PM [http] [ID#529] Info: Closing connection 682 3568 PrimeGrid 2/13/2020 6:03:13 PM [http] [ID#529] Info: Connection 683 seems to be dead! 3569 PrimeGrid 2/13/2020 6:03:13 PM [http] [ID#529] Info: Closing connection 683 3570 PrimeGrid 2/13/2020 6:03:13 PM [http] [ID#529] Info: Trying 185.193.25.77... 3571 PrimeGrid 2/13/2020 6:03:13 PM Sending scheduler request: To fetch work. 3572 PrimeGrid 2/13/2020 6:03:13 PM Requesting new tasks for NVIDIA GPU 3573 PrimeGrid 2/13/2020 6:03:13 PM [http] HTTP_OP::init_post(): http://www.primegrid.com/cgi/cgi 3574 PrimeGrid 2/13/2020 6:03:13 PM [http] HTTP_OP::libcurl_exec(): ca-bundle set 3575 PrimeGrid 2/13/2020 6:03:14 PM [http] [ID#1] Info: Found bundle for host www.primegrid.com: 0x42fa050 [serially] 3576 PrimeGrid 2/13/2020 6:03:14 PM [http] [ID#1] Info: Hostname www.primegrid.com was found in DNS cache 3577 PrimeGrid 2/13/2020 6:03:14 PM [http] [ID#1] Info: Trying 185.193.25.77... 3578 PrimeGrid 2/13/2020 6:03:18 PM Computation for task genefer16_31777023_0 finished 3579 PrimeGrid 2/13/2020 6:03:20 PM [fxd] starting upload, upload_offset 0 3580 PrimeGrid 2/13/2020 6:03:20 PM [http] HTTP_OP::libcurl_exec(): ca-bundle 'C:\Program Files\BOINC\ca-bundle.crt' 3581 PrimeGrid 2/13/2020 6:03:20 PM [http] HTTP_OP::libcurl_exec(): ca-bundle set 3582 PrimeGrid 2/13/2020 6:03:20 PM Started upload of genefer16_31777023_0_r2038060960_0 3583 PrimeGrid 2/13/2020 6:03:20 PM [file_xfer] URL: http://www.primegrid.com/cgi/file_upload_handler 3584 PrimeGrid 2/13/2020 6:03:21 PM [http] [ID#530] Info: Found bundle for host www.primegrid.com: 0x42fa050 [serially] 3585 PrimeGrid 2/13/2020 6:03:21 PM [http] [ID#530] Info: Hostname www.primegrid.com was found in DNS cache 3586 PrimeGrid 2/13/2020 6:03:21 PM [http] [ID#530] Info: Trying 185.193.25.77... 3587 PrimeGrid 2/13/2020 6:03:34 PM [http] [ID#529] Info: connect to 185.193.25.77 port 80 failed: Timed out 3588 PrimeGrid 2/13/2020 6:03:34 PM [http] [ID#529] Info: Failed to connect to www.primegrid.com port 80: Timed out 3589 PrimeGrid 2/13/2020 6:03:34 PM [http] [ID#529] Info: Closing connection 684 3590 PrimeGrid 2/13/2020 6:03:34 PM [http] HTTP error: Couldn't connect to server 3591 PrimeGrid 2/13/2020 6:03:34 PM [file_xfer] http op done; retval -107 (connect() failed) 3592 PrimeGrid 2/13/2020 6:03:34 PM [file_xfer] file transfer status -107 (connect() failed) 3593 PrimeGrid 2/13/2020 6:03:34 PM Temporarily failed upload of genefer16_31776850_1_r1286889301_0: connect() failed 3594 PrimeGrid 2/13/2020 6:03:34 PM Backing off 00:02:05 on upload of genefer16_31776850_1_r1286889301_0 3595 PrimeGrid 2/13/2020 6:03:35 PM [http] [ID#1] Info: connect to 185.193.25.77 port 80 failed: Timed out 3596 PrimeGrid 2/13/2020 6:03:35 PM [http] [ID#1] Info: Failed to connect to www.primegrid.com port 80: Timed out 3597 PrimeGrid 2/13/2020 6:03:35 PM [http] [ID#1] Info: Closing connection 685 3598 PrimeGrid 2/13/2020 6:03:35 PM [http] HTTP error: Couldn't connect to server 3599 2/13/2020 6:03:35 PM Project communication failed: attempting access to reference site 3600 2/13/2020 6:03:35 PM [http] HTTP_OP::init_get(): https://www.google.com/ 3601 2/13/2020 6:03:35 PM [http] HTTP_OP::libcurl_exec(): ca-bundle set 3602 PrimeGrid 2/13/2020 6:03:35 PM Scheduler request failed: Couldn't connect to server


meanwhile, while the machine is in it's error state, I can access primegrid, google, etc. with a web browser no problem.
I've tried project reset, rebooting the machine a few times, and restarting boinc with no luck.

Any ideas what to try next?

--Tim

ID: 137856 | Report as offensive
Profile mikey
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Joined: 17 Mar 09
Posts: 1252
ID: 37043
Credit: 523,287,229
RAC: 141,057
Discovered 1 mega prime321 LLR Ruby: Earned 2,000,000 credits (2,038,739)Cullen LLR Ruby: Earned 2,000,000 credits (2,074,615)ESP LLR Ruby: Earned 2,000,000 credits (2,013,823)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,142,353)PPS LLR Turquoise: Earned 5,000,000 credits (7,282,084)PSP LLR Ruby: Earned 2,000,000 credits (2,194,746)SoB LLR Ruby: Earned 2,000,000 credits (2,778,827)SR5 LLR Ruby: Earned 2,000,000 credits (2,053,250)SGS LLR Turquoise: Earned 5,000,000 credits (5,147,768)TRP LLR Ruby: Earned 2,000,000 credits (2,025,737)Woodall LLR Ruby: Earned 2,000,000 credits (2,014,811)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (23,770,672)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (944,431)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,813,253)PPS Sieve Double Silver: Earned 200,000,000 credits (339,850,817)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,446,797)AP 26/27 Sapphire: Earned 20,000,000 credits (33,140,471)WW Ruby: Earned 2,000,000 credits (2,884,000)GFN Sapphire: Earned 20,000,000 credits (47,219,029)PSA Sapphire: Earned 20,000,000 credits (20,457,430)
Message 137877 - Posted: 14 Feb 2020 | 11:28:39 UTC - in response to Message 137856.

One of my machines suddenly started behaving strangely yesterday and I have not been able to figure out the issue. I'm hoping someone else here might have some suggestions...

This is a long time running machine on the same network with my other computers, it will run several tasks, then start failing to upload or download new ones. it seems to sit in this state until I hit 'project update' in the boinc manager, then it connects, grabs a new set of workunits and crunches away. after a round (or several) of workunits, it will get hung again.


meanwhile, while the machine is in it's error state, I can access primegrid, google, etc. with a web browser no problem.
I've tried project reset, rebooting the machine a few times, and restarting boinc with no luck.

Any ideas what to try next?

--Tim


I had a machine that refused to get ANY tasks at all, I went thru the same steps you did but what fixed it was removing PG and then reloading it in Boinc, now it works just fine.

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Profile TimTProject donor
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Joined: 2 Dec 11
Posts: 437
ID: 121414
Credit: 1,527,733,977
RAC: 641,266
Discovered 5 mega primesFound 4 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 12 primes in the 2020 Tour de PrimesFound 3 primes in the 2021 Tour de PrimesFound 1 prime in the 2021 Tour de Primes Mountain Stage321 LLR Sapphire: Earned 20,000,000 credits (21,415,573)Cullen LLR Sapphire: Earned 20,000,000 credits (21,023,197)ESP LLR Sapphire: Earned 20,000,000 credits (21,937,716)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,542,115)PPS LLR Emerald: Earned 50,000,000 credits (53,085,204)PSP LLR Sapphire: Earned 20,000,000 credits (22,003,717)SoB LLR Sapphire: Earned 20,000,000 credits (20,586,237)SR5 LLR Sapphire: Earned 20,000,000 credits (21,053,783)SGS LLR Sapphire: Earned 20,000,000 credits (20,927,235)TRP LLR Sapphire: Earned 20,000,000 credits (20,495,653)Woodall LLR Sapphire: Earned 20,000,000 credits (25,444,348)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (23,450,078)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (74,346)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,184,525)PPS Sieve Double Gold: Earned 500,000,000 credits (572,940,608)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (287,513)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,074,848)AP 26/27 Double Bronze: Earned 100,000,000 credits (108,603,066)WW Emerald: Earned 50,000,000 credits (92,444,000)GFN Double Silver: Earned 200,000,000 credits (378,152,421)PSA Emerald: Earned 50,000,000 credits (72,018,672)
Message 137880 - Posted: 14 Feb 2020 | 13:15:23 UTC - in response to Message 137877.

Thanks for the suggestion, Mikey -- but that alone didn't do the trick in my case...

for the sake of documenting the issue:

-- I tried detaching from primegrid and reattached to the project. I quickly ran into the exact same issue

-- I uninstalled boinc, deleted the boinc data directory, re-installed, and re-attached to PG. Again, ran into the same issue -- but this time, while re-downloading boinc, I suddenly lost access to the boinc download site... hmm - I have a theory....

-- My ISP is verizon fios, and I use their phone app to control my kid's internet access. In the app, I can turn off 'network protection' completely -- as soon as I did that, boom -- everything worked. I triple checked to make sure this computer was not in any restricted group and there were no firewall rules specific to the machine. the machine was in the 'default' access group which has no specific restrictions. As a test, I created a 'open access' group that specifically disabled all restrictions and put all my crunching machines in there, then I turned the protection service back on... I'm guessing that somewhere my router decided that primegrid was trying to hack just one of the many computers it's talking to on my network.

I'll give it some time and update if that happened to work

--Tim

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Scott BrownProject donor
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Joined: 17 Oct 05
Posts: 2222
ID: 1178
Credit: 9,228,352,452
RAC: 3,198,058
Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 28 mega primesEliminated 7 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 2 Fermat divisors2012 Tour de Primes highest prime count2012 Tour de Primes most Mountain Stage primes2015 Tour de Primes highest prime count2016 Tour de Primes highest prime countFound 23 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 2 primes in the 2018 Tour de Primes Mountain Stage2019 Tour de Primes highest prime countFound 22 primes in the 2019 Tour de Primes2020 Tour de Primes highest prime scoreFound 21 primes in the 2020 Tour de PrimesFound 4 mega primes in the 2020 Tour de PrimesFound 8 primes in the 2021 Tour de PrimesFound 1 mega prime in the 2021 Tour de Primes321 LLR Double Silver: Earned 200,000,000 credits (201,403,028)Cullen LLR Double Silver: Earned 200,000,000 credits (201,409,561)ESP LLR Double Silver: Earned 200,000,000 credits (203,249,784)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (109,580,172)PPS LLR Double Gold: Earned 500,000,000 credits (713,215,091)PSP LLR Double Bronze: Earned 100,000,000 credits (126,982,721)SoB LLR Double Bronze: Earned 100,000,000 credits (135,747,083)SR5 LLR Double Silver: Earned 200,000,000 credits (214,437,634)SGS LLR Double Silver: Earned 200,000,000 credits (201,595,744)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Silver: Earned 200,000,000 credits (201,215,056)Woodall LLR Double Bronze: Earned 100,000,000 credits (101,447,725)321 Sieve (suspended) Double Silver: Earned 200,000,000 credits (235,451,253)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (285,139,652)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,728,939,994)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Silver: Earned 200,000,000 credits (203,523,358)TRP Sieve (suspended) Double Silver: Earned 200,000,000 credits (201,489,157)AP 26/27 Double Silver: Earned 200,000,000 credits (385,720,907)WW Double Silver: Earned 200,000,000 credits (407,816,000)GFN Double Ruby: Earned 2,000,000,000 credits (2,026,920,859)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 137886 - Posted: 14 Feb 2020 | 14:18:24 UTC


flush DNS can be your firend. :)

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Profile TimTProject donor
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Joined: 2 Dec 11
Posts: 437
ID: 121414
Credit: 1,527,733,977
RAC: 641,266
Discovered 5 mega primesFound 4 primes in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 12 primes in the 2020 Tour de PrimesFound 3 primes in the 2021 Tour de PrimesFound 1 prime in the 2021 Tour de Primes Mountain Stage321 LLR Sapphire: Earned 20,000,000 credits (21,415,573)Cullen LLR Sapphire: Earned 20,000,000 credits (21,023,197)ESP LLR Sapphire: Earned 20,000,000 credits (21,937,716)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,542,115)PPS LLR Emerald: Earned 50,000,000 credits (53,085,204)PSP LLR Sapphire: Earned 20,000,000 credits (22,003,717)SoB LLR Sapphire: Earned 20,000,000 credits (20,586,237)SR5 LLR Sapphire: Earned 20,000,000 credits (21,053,783)SGS LLR Sapphire: Earned 20,000,000 credits (20,927,235)TRP LLR Sapphire: Earned 20,000,000 credits (20,495,653)Woodall LLR Sapphire: Earned 20,000,000 credits (25,444,348)321 Sieve (suspended) Sapphire: Earned 20,000,000 credits (23,450,078)Cullen/Woodall Sieve (suspended) Bronze: Earned 10,000 credits (74,346)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,184,525)PPS Sieve Double Gold: Earned 500,000,000 credits (572,940,608)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Silver: Earned 100,000 credits (287,513)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,074,848)AP 26/27 Double Bronze: Earned 100,000,000 credits (108,603,066)WW Emerald: Earned 50,000,000 credits (92,444,000)GFN Double Silver: Earned 200,000,000 credits (378,152,421)PSA Emerald: Earned 50,000,000 credits (72,018,672)
Message 137892 - Posted: 14 Feb 2020 | 15:17:31 UTC - in response to Message 137886.


flush DNS can be your firend. :)



Good point, and you are uncovering my failings in proper issue documentation -- I actually tried that at some point, and it didn't have any effect.

Also, it's been running properly since that change -- so I'm feeling more confident that it's some change Verizon made to the firewall in the router.

ID: 137892 | Report as offensive

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