Daemon error: Failed to update txpool transaction metadata: Error finding txpool tx meta: MDB_NOTFOUND: No matching key/data pair found about electroneum HOT 9 CLOSED

Same prob here.

from electroneum.

Hi,
i did post on the monero thread, but i will post here also because i see that using electroneumd
I think i don't found block in the same way @sleever did describe.
But as the pool begin after the 10 of december is see the error message "Daemon error: Failed to update txpool transaction metadata: Error finding txpool tx meta: MDB_NOTFOUND: No matching key/data pair found" from that time (i have no thing before).

I have Ubuntu 14.4.05
the daemon is linux-x64-0.11.0.0 (from linux-x64-0.11.0.0.zip)
nodejs: node-v0.10.48-linux-x64.tar.gz
db: redis-2.6.14.tar.gz
pool: github.com/fancoder/cryptonote-universal-pool.git

I didn't start the RPC wallet. Only the daemon is ruuning.

• I got the exactly the same problem (with electroneum), somebody did davance on the problem ? found a solution ?

1. I use :
   ./electroneumd --db-salvage
   (from monero)
   The program seems to work but take 3 or 4 second to finish. I didn't check the result.

I prefer to run this solution first:
2)

• I have deleted the data.mdb and lock.mdb file to resync all the block chain
• ./electroneumd
  ...sync...sync...
  i don't know the result for now

I would like to have the feeling of everybody.
I did see in the code the result of the function was changed from the return value to a boolean value. I think that is to check the validity of the block.
The problem that happend with the block is coming (from your point of vue) more probably from:

a pbm in a node of the pool (so all pools have the same problem) ?
a pbm on the local node (only one pool have a probleme from time to time) ?
it was caused by the dameon of the blockchain ?
it was caused by a mining software ?
it is a glitch in the transmit of the blockchain ?

And also how this problem make we stop receving block ?

from electroneum.

Ok, the sync is done i didn't notice an problem : no error.

If i understand well the problem we did have must be local ?

I will wait about 24h like that because in the logs i did notice the problem occured once a day.
to see what append.

Also i did change the config of the pool (config.json):
I put trust_share = false .
I don't deeply understand the use of that, but it look like there is a check between miners and the pool. So it could not hurt (before i let trust_share = true ).

keep you updated, bye.

from electroneum.

ok,
That failled.
i will have to apply the patch.

from electroneum.

Have you come up with a solution yet?

from electroneum.

I don't think that it has any impact on the ability to find blocks. I'm running electroneumd daemon without mining on the other node, with the block chain that was synced from zero, with DB options --db-sync-mode safe --block-sync-size 20. I already saw this error 4 times over a week.

I have certain concerns about electroneumd in general because right now I don't see any improvements comparing to monerod project and at the moment it basically runs several hundred commits older version of monerod. There is no development happening in electroneum repository, last meaningful commit was more than a month ago. Probably this blockchain is facing scaling challenges which no one is willing to address. I found last block 19 days ago and this round is almost 300%. So I don't think that those errors affect block mining, it is just network itself: block substitution and massive pools, like nanopool.

2018-01-07 09:16:47.940 [P2P1]  INFO    stacktrace      src/common/stack_trace.cpp:120  Exception: cryptonote::DB_ERROR
2018-01-07 09:16:47.949 [P2P1]  ERROR   txpool  src/cryptonote_core/tx_pool.cpp:516     Failed to update txpool transaction metadata: Error finding txpool tx meta: MDB_NOTFOUND: No matching key/data pair found
2018-01-07 14:00:26.206 [P2P9]  INFO    stacktrace      src/common/stack_trace.cpp:120  Exception: cryptonote::DB_ERROR
2018-01-07 14:00:26.224 [P2P9]  ERROR   txpool  src/cryptonote_core/tx_pool.cpp:516     Failed to update txpool transaction metadata: Error finding txpool tx meta: MDB_NOTFOUND: No matching key/data pair found
2018-01-10 09:00:31.600 [P2P6]  INFO    stacktrace      src/common/stack_trace.cpp:120  Exception: cryptonote::DB_ERROR
2018-01-10 09:00:31.612 [P2P6]  ERROR   txpool  src/cryptonote_core/tx_pool.cpp:516     Failed to update txpool transaction metadata: Error finding txpool tx meta: MDB_NOTFOUND: No matching key/data pair found
2018-01-13 11:25:13.032 [P2P9]  INFO    stacktrace      src/common/stack_trace.cpp:120  Exception: cryptonote::DB_ERROR
2018-01-13 11:25:13.064 [P2P9]  ERROR   txpool  src/cryptonote_core/tx_pool.cpp:516     Failed to update txpool transaction metadata: Error finding txpool tx meta: MDB_NOTFOUND: No matching key/data pair found

from electroneum.

i have the same problem , dont tell me to resync , it took me days to sync

is there a fix

from electroneum.

@AwadElkarem pb resolved ?

from electroneum.

We are soon releasing a major release (non fork) that should take care of this issue. Pools are also now obsolete.

from electroneum.