Comments (6)
Option: perhaps the majority of the peers that we contact do not return new peers for some reason? This would explain why we get few candidates while the walk success rate is relatively high. This should be fairly easy to confirm of deny.
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Reproduced this on my Ubuntu machine.
Instead of expected 21 candidates I'm seeing as low as 4 candidates.
This is with a fully connectable Tribler instance.
from dispersy.
After 15 minutes there are 0 candidates in Search community. Search community is broken in current devel.
Strangely enough, AllChannels is bursting with peers, sometimes 27 peers.
From git://github.com/Tribler/tribler
e34d4e2..5fe13d3 devel -> origin/devel
Updating e34d4e2..5fe13d3
from dispersy.
The mystery continues to unfold.
Load balancing needs to be improved, both bootstrap_candidates and normal peers. There is a bit of hammering:
- 2 bootstrap_candidates get: 109 + 110 = 219 connections
- 10 bootstrap_candidates get: 52 connections in total
Some normal peers also are hammered, see below.
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More details on how walks fail after running for almost 15hours:
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Ended up being a bug in the tracker. Long story short, the tracker's response messages would use the highest 'community version number' that the tracker knew of. Hence, once someone talked to the trackers using version 0002 it would respond to any subsequent request (from any other peer in that community) with version 0002. This response would then be dropped because this version is unknown.
To fix this the tracker code has been modified to only respond with version 0000. All trackers are still running the older svn based code and we will not update svn. Instead, we will fix the code on git and slowly migrate our trackers to the latest git.
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Related Issues (20)
- Objects that do a database call in their init HOT 2
- Test test_tracker in TestBootstrapServers is unstable HOT 1
- The upgrade procedure is not tested and goes back to version 1
- Generator only used to get one item? HOT 2
- TaskManager tests are hanging. HOT 2
- Refactor _resume_delayed HOT 1
- The libnacl submodule can be removed
- The add and add_keys in the bloomfilter contain identical code
- The test to check whether the bootstrap servers are up should be fixed
- Get rid of all the hard-coded sleeps in the tests
- meta_message table is filled with duplicates
- Linux unit tests pass on PR with error HOT 1
- Error when changing meta messages on community upgrade HOT 1
- The Dispersy tracker stress test could be part of our tests HOT 1
- Make Dispersy available on PyPi HOT 3
- Remove DoubleMemberAuthentication
- Bootstrap server test does not work anymore after n-hop sync HOT 3
- Infinite growing dictionary in Dispersy statistics HOT 2
- Add new release HOT 1
- Missing license HOT 2
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