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Main => Technical Support => Topic started by: Troglodactyl on January 30, 2016, 08:24:30 pm

Title: Unlinkable block error when syncing
Post by: Troglodactyl on January 30, 2016, 08:24:30 pm

I've attempted to resync a number of times today and keep stalling out with this:

Code: [Select]

1270591ms th_a       application.cpp:525           handle_block         ] Error when pushing block:
3080000 unlinkable_block_exception: unlinkable block
block does not link to known chain
    {}
    th_a  fork_database.cpp:81 _push_block

    {"new_block":{"previous":"002ed047b2c977366e45ec5164ae95d2ae84bb97","timestamp":"2016-01-29T01:37:33","witness":"1.6.17","transaction_merkle_root":"0000000000000000000000000000000000000000","extensions":[],"witness_signature":"204303bc91c8cb28cdcc38575ec9547f0dc4970170b831683c75f1f0abbf92d48136505af995804ab9bea416a5f90afe96b7db762fc2dfc033f36083416b9f4d47","transactions":[]}}                                                                                                         
    th_a  db_block.cpp:201 _push_block
1270591ms th_a       fork_database.cpp:60          push_block           ] Pushing block to fork database that failed to link: 002ed049662d95b06d7e8164b27e204b113511ba, 3067977
1270591ms th_a       fork_database.cpp:61          push_block           ] Head: 3067959, 002ed0373fd510a23b375e022c62154499b35bbe
1270591ms th_a       application.cpp:525           handle_block         ] Error when pushing block:
3080000 unlinkable_block_exception: unlinkable block
block does not link to known chain
    {}
    th_a  fork_database.cpp:81 _push_block

    {"new_block":{"previous":"002ed0480aea3c92bd537999d865cc7cb3c0a54e","timestamp":"2016-01-29T01:37:42","witness":"1.6.35","transaction_merkle_root":"0000000000000000000000000000000000000000","extensions":[],"witness_signature":"1f5d8a0a03d97498a1d501e39510cec4e92d3db093d5e24cba4b3ab5b09b5661a764686113e417c2753377c6bb7f77d0a39af0231f67ed7fda285477f52145697f","transactions":[]}}                                                                                                         
    th_a  db_block.cpp:201 _push_block
1270591ms th_a       fork_database.cpp:60          push_block           ] Pushing block to fork database that failed to link: 002ed04a061430c5daec0f233e6b2147e05d0768, 3067978
1270591ms th_a       fork_database.cpp:61          push_block           ] Head: 3067959, 002ed0373fd510a23b375e022c62154499b35bbe
1270591ms th_a       application.cpp:525           handle_block         ] Error when pushing block:
3080000 unlinkable_block_exception: unlinkable block
block does not link to known chain
    {}
    th_a  fork_database.cpp:81 _push_block

    {"new_block":{"previous":"002ed049662d95b06d7e8164b27e204b113511ba","timestamp":"2016-01-29T01:37:45","witness":"1.6.49","transaction_merkle_root":"0000000000000000000000000000000000000000","extensions":[],"witness_signature":"1f71078310ac9dcff2b706d275e3b365d4a6637d00da692d1b5c9be87ca708200307fe0e61ccf1a82dc92472442377ad6be2d8d4e163fd5b66ee5042c369828912","transactions":[]}}
    th_a  db_block.cpp:201 _push_block
1270592ms th_a       fork_database.cpp:60          push_block           ] Pushing block to fork database that failed to link: 002ed04bb1ee8f9843fed2aa9054f76bf75425a1, 3067979
1270592ms th_a       fork_database.cpp:61          push_block           ] Head: 3067959, 002ed0373fd510a23b375e022c62154499b35bbe

Any ideas?

Title: Re: Unlinkable block error when syncing
Post by: abit on January 31, 2016, 12:43:21 am

Upgrade to newest release please.

Title: Re: Unlinkable block error when syncing
Post by: Xeldal on January 31, 2016, 12:54:38 am

I'm running the winx64-cli-tool.exe that was put out just an hour ago and I'm getting the same "unlinkable-block"

It catches up and then stalls out, over and over again.

Quote

2801963ms th_a       application.cpp:525           handle_block         ] Error
when pushing block:
3080000 unlinkable_block_exception: unlinkable block
block does not link to known chain
    {}
    th_a  fork_database.cpp:81 graphene::chain::fork_database::_push_block

    {"new_block":{"previous":"002f962ff67b4ae68af73d7d64c9d55d551dd707","timesta
mp":"2016-01-31T00:46:24","witness":"1.6.38","transaction_merkle_root":"00000000
00000000000000000000000000000000","extensions":[],"witness_signature":"206e44a57
4651ef4c4748f7e5271f0c4559433af9f5bf0bd52d7e110a1d2642e2c57844a1310291644a3be044
06eb73f50870bdbfffb4fdaaa96a3f41e5d369e53","transactions":[]}}
    th_a  db_block.cpp:201 graphene::chain::database::_push_block

I had a similar issue a month ago and then it went away.  Now its back again.

Title: Re: Unlinkable block error when syncing
Post by: abit on January 31, 2016, 01:58:47 am

My witness_node works fine under windows.  Started with --replay-blockchain.

Title: Re: Unlinkable block error when syncing
Post by: Xeldal on January 31, 2016, 02:24:17 am

Quote from: abit on January 31, 2016, 01:58:47 am

My witness_node works fine under windows.  Started with --replay-blockchain.

Yes, I started with --replay also.
Maybe its something to do with my VPN.   But I havn't change anything with that and it was working perfectly before. IDK

Title: Re: Unlinkable block error when syncing
Post by: Troglodactyl on January 31, 2016, 05:31:08 am

Got synced.  I re-checked out the latest tag and rebuilt (again) in RelWithDebInfo mode.  Not sure if I wasn't really on latest before or if something else was going on, but thanks.

Title: Re: Unlinkable block error when syncing
Post by: Xeldal on February 25, 2016, 10:11:22 pm

Quote from: Xeldal on January 31, 2016, 12:54:38 am

I'm running the winx64-cli-tool.exe that was put out just an hour ago and I'm getting the same "unlinkable-block"

It catches up and then stalls out, over and over again.

Quote

2801963ms th_a       application.cpp:525           handle_block         ] Error
when pushing block:
3080000 unlinkable_block_exception: unlinkable block
block does not link to known chain
    {}
    th_a  fork_database.cpp:81 graphene::chain::fork_database::_push_block

    {"new_block":{"previous":"002f962ff67b4ae68af73d7d64c9d55d551dd707","timesta
mp":"2016-01-31T00:46:24","witness":"1.6.38","transaction_merkle_root":"00000000
00000000000000000000000000000000","extensions":[],"witness_signature":"206e44a57
4651ef4c4748f7e5271f0c4559433af9f5bf0bd52d7e110a1d2642e2c57844a1310291644a3be044
06eb73f50870bdbfffb4fdaaa96a3f41e5d369e53","transactions":[]}}
    th_a  db_block.cpp:201 graphene::chain::database::_push_block

I had a similar issue a month ago and then it went away.  Now its back again.

For anyone on Windows having this issue I think I may have solved it.  At least it seems that way so far.

It appears to be a windows time sync issue.
If you've never set it yourself time sync is likely set to manual, it should be set to Automatic.
To do this:
>click Start> type "services" > select "Services" from the list > double click "Windows Time" from the services list
> change startup type to "Automatic" >   Click Apply >

you may then need to start the service if it is not already running.
And thats it.  After some time the witness_node will catch up, time will sync, and you should be good to go.
no more unlinkable blocks

Heres a video describing the Windows Time process:
https://www.youtube.com/watch?v=JJL6geu7ovk

[update]: Spoke to soon :(   I do still get the unlinkable block errors and occasional hangs but a lot less frequent. 
[update2]: seems to have zero effect.  getting unlinkable block all the time now.  Gets stuck for HOURS! .. really annoying.  I can't figure it out.