Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
-+-
 Reporter:  juga |  Owner:  (none)
 Type:  defect   | Status:  closed
 Priority:  Medium   |  Milestone:  sbws:
 |  1.1.x-final
Component:  Core Tor/sbws|Version:
 Severity:  Normal   | Resolution:
 Keywords:  sbws-1.0-must-moved-20181128,|  worksforme
  10-proposed|  Actual Points:
Parent ID:  #25925   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by teor):

 Replying to [comment:22 juga]:
 > This has not happened for long time. If it happens again we can reopen
 it.

 No, let's open a new ticket, and reference this one.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
-+-
 Reporter:  juga |  Owner:  (none)
 Type:  defect   | Status:  closed
 Priority:  Medium   |  Milestone:  sbws:
 |  1.1.x-final
Component:  Core Tor/sbws|Version:
 Severity:  Normal   | Resolution:
 Keywords:  sbws-1.0-must-moved-20181128,|  worksforme
  10-proposed|  Actual Points:
Parent ID:  #25925   | Points:
 Reviewer:   |Sponsor:
-+-
Changes (by juga):

 * status:  needs_information => closed
 * resolution:   => worksforme


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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
-+-
 Reporter:  juga |  Owner:  (none)
 Type:  defect   | Status:
 |  needs_information
 Priority:  Medium   |  Milestone:  sbws:
 |  1.1.x-final
Component:  Core Tor/sbws|Version:
 Severity:  Normal   | Resolution:
 Keywords:  sbws-1.0-must-moved-20181128,|  Actual Points:
  10-proposed|
Parent ID:  #25925   | Points:
 Reviewer:   |Sponsor:
-+-

Comment (by juga):

 This has not happened for long time. If it happens again we can reopen it.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by juga):

 I can confirm that enabling predicted circuits does not solve the problem
 of sbws stalling.
 Regarding the circuits timeout, i think this happen mostly when a new
 prioritization loop starts measuring all the relays that failed to be
 measured before cause they're unstable (for instance many of the
 UbuntuCore2XX), but this is not making sbws stall.
 So i'd open a new ticket to don't prioritize relays that fail to be
 measured.
 I think this ticket can be closed, and i'll explain in #28663 the reasons
 why i think sbws is stalling.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 Replying to [comment:17 juga]:
 > Replying to [comment:11 teor]:
 > > Can you please paste the full info-level logs in a pastebin?
 > sbws stalled at `Dec 10 15:46:57`, it was started at 11:57:31.
 >
 > Info log since it started until it stalled:
 > https://share.riseup.net/#zPpTz3wTCRdyb2HjaWzUtw
 >
 > The previous log seaching for some words:
 > {{{
 > egrep -wi --color 'No circuits are opened|circ \(length 3|Expiring|live'
 info_stalled_4h.log
 > }}}
 >
 > Now i'll run it enabling predicted circuits and paste the log tomorrow.
 > https://paste.debian.net/hidden/339cfb38/

 I don't see anything wrong with tor in these logs.
 Maybe this stall is on the sbws side?

 If sbws is stalling because of a bug in sbws, then enabling predicted
 circuits probably won't fix it.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 Replying to [comment:16 juga]:
 > Replying to [comment:12 teor]:
 > > This issue is an instance of #27049: sbws does not open any 3-hop
 circuits, so it stalls when all 3-hop circuits time out.
 >
 > I don't understand this sentence.
 > I guess the 3-hop circuits are open by Tor to download descriptors and
 network status documents?.

 1-hop circuits are opened by tor to download descriptors and network
 status documents.

 3-hop circuits are opened by most tor clients to connect to exits and
 onion services.

 > Wouldn't new 3-hop circuits be created when other 3-hop circuits
 timeout?.

 But sbws sets `__DisablePredictedCircuits 1` after bootstrapping, so sbws'
 tor only has its 3-hop circuits from when it bootstraps. When they expire,
 there are no more 3-hop circuits, so tor stops opening circuits.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by juga):

 Replying to [comment:11 teor]:
 > Can you please paste the full info-level logs in a pastebin?
 sbws stalled at `Dec 10 15:46:57`, it was started at 11:57:31.

 Info log since it started until it stalled:
 https://share.riseup.net/#zPpTz3wTCRdyb2HjaWzUtw

 The previous log seaching for some words:
 {{{
 egrep -wi --color 'No circuits are opened|circ \(length 3|Expiring|live'
 info_stalled_4h.log
 }}}

 Now i'll run it enabling predicted circuits and paste the log tomorrow.
 https://paste.debian.net/hidden/339cfb38/

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by juga):

 Replying to [comment:12 teor]:
 > This issue is an instance of #27049: sbws does not open any 3-hop
 circuits, so it stalls when all 3-hop circuits time out.

 I don't understand this sentence.
 I guess the 3-hop circuits are open by Tor to download descriptors and
 network status documents?.
 Wouldn't new 3-hop circuits be created when other 3-hop circuits timeout?.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 Replying to [comment:14 juga]:
 > Replying to [comment:11 teor]:
 > > Can you please paste the full info-level logs in a pastebin?
 > > It looks like these warning logs come after any errors that are
 disabling the relays.
 >
 > Complete info log, 5 first minutes from a test instance, running from
 master (so it has torrc debugging options) where i also added to torrc
 info log and ConnectionPadding 0. It has 'LearnCircuitBuildTimeout': 0.
 Tor version 0.3.4.9:
 >
 > https://paste.debian.net/hidden/db05571a/

 I'm sorry, I need the logs when sbws is stalled.

 > Are these 3 length circuits?: `exit circ (length 3, last hop
 CalyxInstitute05)`.

 Yes.

 > Any suggestion on what to search for in the log?

 If sbws is stalling because all 3-hop circuits time out:

 Replying to [comment:12 teor]:
 > This issue is an instance of #27049: sbws does not open any 3-hop
 circuits, so it stalls when all 3-hop circuits time out.
 >
 > One quick fix is to enable predicted circuits (#28701).
 >
 > I opened a tor ticket for this issue (#28714).

 Then you should look for:
 * circuit timeout messages
 * "No circuits are opened"
 * messages that say that Tor has no live guards

 Since you changed the tor version, I don't know if the messages will be
 the same as 0.2.9.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by juga):

 Replying to [comment:11 teor]:
 > Can you please paste the full info-level logs in a pastebin?
 > It looks like these warning logs come after any errors that are
 disabling the relays.

 Complete info log, 5 first minutes from a test instance, running from
 master (so it has torrc debugging options) where i also added to torrc
 info log and ConnectionPadding 0. It has 'LearnCircuitBuildTimeout': 0.
 Tor version 0.3.4.9:

 https://paste.debian.net/hidden/db05571a/

 Are these 3 length circuits?: `exit circ (length 3, last hop
 CalyxInstitute05)`.

 Any suggestion on what to search for in the log?

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by juga):

 Replying to [comment:9 teor]:

 > Are you running Tor 0.2.9?

 Yes, i was, updated now to 0.3.4.9

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 This issue is an instance of #27049: sbws does not open any 3-hop
 circuits, so it stalls when all 3-hop circuits time out.

 One quick fix is to enable predicted circuits (#28701).

 I opened a tor ticket for this issue (#28714).

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 Can you please paste the full info-level logs in a pastebin?
 It looks like these warning logs come after any errors that are disabling
 the relays.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 Replying to [comment:9 teor]:
 > Replying to [comment:7 teor]:
 > > Replying to [comment:6 juga]:
 > > {{{
 > > 0 guards are live.
 > > }}}
 > >
 > > > I can't figure out reasons with that, but maybe you do.
 > >
 > > sbws sets `UseEntryGuards 0`, so it should never have any guards:
 > > https://github.com/torproject/sbws/blob/master/sbws/globals.py#L19
 >
 > Are you running Tor 0.2.9?
 >
 > The "entry guards are live" log message is not in master:
 >
 https://github.com/torproject/tor/blob/master/src/core/or/circuituse.c#L630
 >
 > I think that it was removed in 0.3.0.1-alpha:
 >
 
https://github.com/torproject/tor/commit/68679504323b0a676a446b8fb34b976c9dc66b4f

 I think this is also an unhelpful log message, because there are no entry
 guards.

 I'll need info-level logs to debug this issue.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 Replying to [comment:7 teor]:
 > Replying to [comment:6 juga]:
 > > Replying to [comment:1 teor]:
 > > > What does tor say in its logs?
 > >
 > > The main repeated part:
 > >
 > > {{{
 > > Oct 28 05:43:00.000 [notice] Heartbeat: Tor's uptime is 2 days 17:59
 hours, with 7 circuits open. I've sent 15.08 GB and received 482.17 GB.
 > > Oct 28 05:43:00.000 [notice] Average packaged cell fullness: 43.617%.
 TLS write overhead: 4%
 > > Oct 28 05:50:28.000 [notice] Have tried resolving or connecting to
 address '[scrubbed]' at 3 different places. Giving up.
 > > Oct 28 05:57:49.000 [notice] No circuits are opened. Relaxed timeout
 for circuit 40835 (a General-purpose client 2-hop circuit in state doing
 handshakes with channel state open) to 1ms. However, it appears the
 circuit has timed out anyway. 0 guards are live. [53 similar message(s)
 suppressed in last 3600 seconds]
 > > }}}
 >
 > The key parts of this message are:
 > {{{
 > No circuits are opened. Relaxed timeout for circuit
 > }}}
 >
 > I think we can fix this bug by disabling adaptive timeouts in tor. See
 #28646.

 We can ignore this message. It is an unhelpful log message in Tor. It
 happens even when the circuit timeout will not change. See #28698.

 > {{{
 > 0 guards are live.
 > }}}
 >
 > > I can't figure out reasons with that, but maybe you do.
 >
 > sbws sets `UseEntryGuards 0`, so it should never have any guards:
 > https://github.com/torproject/sbws/blob/master/sbws/globals.py#L19

 Are you running Tor 0.2.9?

 The "entry guards are live" log message is not in master:
 https://github.com/torproject/tor/blob/master/src/core/or/circuituse.c#L630

 I think that it was removed in 0.3.0.1-alpha:
 
https://github.com/torproject/tor/commit/68679504323b0a676a446b8fb34b976c9dc66b4f

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:
  |  needs_information
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+
Changes (by teor):

 * status:  new => needs_information


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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by teor):

 Replying to [comment:6 juga]:
 > Replying to [comment:1 teor]:
 > > What does tor say in its logs?
 >
 > The main repeated part:
 >
 > {{{
 > Oct 28 05:43:00.000 [notice] Heartbeat: Tor's uptime is 2 days 17:59
 hours, with 7 circuits open. I've sent 15.08 GB and received 482.17 GB.
 > Oct 28 05:43:00.000 [notice] Average packaged cell fullness: 43.617%.
 TLS write overhead: 4%
 > Oct 28 05:50:28.000 [notice] Have tried resolving or connecting to
 address '[scrubbed]' at 3 different places. Giving up.
 > Oct 28 05:57:49.000 [notice] No circuits are opened. Relaxed timeout for
 circuit 40835 (a General-purpose client 2-hop circuit in state doing
 handshakes with channel state open) to 1ms. However, it appears the
 circuit has timed out anyway. 0 guards are live. [53 similar message(s)
 suppressed in last 3600 seconds]
 > }}}

 The key parts of this message are:
 {{{
 No circuits are opened. Relaxed timeout for circuit
 }}}

 I think we can fix this bug by disabling adaptive timeouts in tor. See
 #28646.

 {{{
 0 guards are live.
 }}}

 > I can't figure out reasons with that, but maybe you do.

 sbws sets `UseEntryGuards 0`, so it should never have any guards:
 https://github.com/torproject/sbws/blob/master/sbws/globals.py#L19

 I need better logs to debug this issue, please implement #28645.

 > There are also some of the type:
 > {{{
 > Oct 26 23:33:59.000 [warn] Tried connecting to router at REDACTED, but
 identity key was not as expected: wanted REDACTED but got REDACTED.
 > }}}

 It is safe to paste these logs without redacting them. sbws just contacts
 relays at random, so there is no need to protect anyone's privacy.

 Once you've done #28645 and #28646, please paste the un-redacted logs in
 this ticket.

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
--+
 Reporter:  juga  |  Owner:  (none)
 Type:  defect| Status:  new
 Priority:  Medium|  Milestone:  sbws:
  |  1.0.x-final
Component:  Core Tor/sbws |Version:
 Severity:  Normal| Resolution:
 Keywords:  sbws-1.0-must-moved-20181128  |  Actual Points:
Parent ID:  #25925| Points:
 Reviewer:|Sponsor:
--+

Comment (by juga):

 Replying to [comment:1 teor]:
 > What does tor say in its logs?

 The main repeated part:

 {{{
 Oct 28 05:43:00.000 [notice] Heartbeat: Tor's uptime is 2 days 17:59
 hours, with 7 circuits open. I've sent 15.08 GB and received 482.17 GB.
 Oct 28 05:43:00.000 [notice] Average packaged cell fullness: 43.617%. TLS
 write overhead: 4%
 Oct 28 05:50:28.000 [notice] Have tried resolving or connecting to address
 '[scrubbed]' at 3 different places. Giving up.
 Oct 28 05:57:49.000 [notice] No circuits are opened. Relaxed timeout for
 circuit 40835 (a General-purpose client 2-hop circuit in state doing
 handshakes with channel state open) to 1ms. However, it appears the
 circuit has timed out anyway. 0 guards are live. [53 similar message(s)
 suppressed in last 3600 seconds]
 }}}

 I can't figure out reasons with that, but maybe you do.

 There are also some of the type:
 {{{
 Oct 26 23:33:59.000 [warn] Tried connecting to router at REDACTED, but
 identity key was not as expected: wanted REDACTED but got REDACTED.
 }}}

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Re: [tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
---+-
 Reporter:  juga   |  Owner:  (none)
 Type:  defect | Status:  new
 Priority:  Medium |  Milestone:  sbws 1.0 (MVP must)
Component:  Core Tor/sbws  |Version:
 Severity:  Normal | Resolution:
 Keywords: |  Actual Points:
Parent ID:  #25925 | Points:
 Reviewer: |Sponsor:
---+-

Comment (by teor):

 What does tor say in its logs?

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[tor-bugs] #28639 [Core Tor/sbws]: After several days, most of the circuits timeout

[Tor Bug Tracker & Wiki]

#28639: After several days, most of the circuits timeout
---+-
 Reporter:  juga   |  Owner:  (none)
 Type:  defect | Status:  new
 Priority:  Medium |  Milestone:  sbws 1.0 (MVP must)
Component:  Core Tor/sbws  |Version:
 Severity:  Normal |   Keywords:
Actual Points: |  Parent ID:  #25925
   Points: |   Reviewer:
  Sponsor: |
---+-
 When the scanner is restarted, circuits most of the circuits doesn't
 timeout.
 The destination is reachable.

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