Topic: "Error -30973, can't open database wallet.dat" on SERVER (Read 1021 times)

reindexing,  no data corrupted.  Currently works well. I will write here again if problem repeats

OK. Are the wallet.dat files identical? (Check if they're the same size and the first few characters are the same on both (just to check the wallet.dat) file isn't corrupted.
Did your daemon wallet start off by reindexing the block chain or did you start a fresh download of it?

On another server I have the same version of bitcoin core and everything is ok.
But here has happened the error on recently installed wallet daemon

Do you mean to say it worked on the previous version of bitcoin core but not the current version after you updated it?
Or that it works on bitcoin core and not bitcoind?

How it can be fixed?  I use last version of bitcoin core so that version has that error

Oh, that's confusing. It showed an error reading wallet.dat but managed to open your addresses and encrypted private keys?
It's probably a temporary issue then and already fixed I guess...

I was using "htop" and kill all "bitcoind" instances, actually it seems only one instance was launched.   
I don't have any problem to use "-salvagewallet" command, wallet works well and sees all transactions but that error ... I will write here if the error repeats

Was it the only instance of daemon running (just, if it wasn't, shutdown the other process and it'll fix the problem)?
If you don't have any bitcoin in the addresses in the wallet.dat, you can go ahead and delete it.

If, for educational purposes or you have bitcoin in there, run the net instace of daemon with the -salvagewallet command (this will knock the syncronisation process back to the start).

on server the wallet daemon was working well for ~15 hours but later terminated, at debug.log I see these errors:

2017-08-26 10:27:06 receive version message: /Bitcoin ABC:0.14.6(EB8.0)/: version 70015, blocks=483369, us=78.46.227.52:8333, peer=12454
2017-08-26 10:27:07 ERROR: AcceptBlockHeader: Consensus::ContextualCheckBlockHeader: 000000000000000000639be19a0123a1c99d9fef89f0b8ac055a77f4ef86ae3b, bad-diffbits, incorrect proof of work (code 16)
2017-08-26 10:27:07 Misbehaving: 220.233.129.186:53974 peer=12454 (0 -> 100) BAN THRESHOLD EXCEEDED
2017-08-26 10:27:07 ERROR: invalid header received
2017-08-26 10:27:07 ProcessMessages(headers, 162003 bytes) FAILED peer=12454
2017-08-26 10:27:24 *** System error while flushing: CDB: Error -30973, can't open database wallet.dat
2017-08-26 10:27:24 Error: Error: A fatal internal error occurred, see debug.log for details
2017-08-26 10:27:24 tor: Thread interrupt
2017-08-26 10:27:24 torcontrol thread exit
2017-08-26 10:27:24 scheduler thread interrupt
2017-08-26 10:27:24 addcon thread exit
2017-08-26 10:27:24 opencon thread exit
2017-08-26 10:27:24 Shutdown: In progress...
2017-08-26 10:27:24 net thread exit
2017-08-26 10:27:24 msghand thread exit
2017-08-26 10:27:26 Dumped mempool: 0.070877s to copy, 1.33012s to dump
2017-08-26 10:27:26 *** System error while flushing: CDB: Error -30973, can't open database wallet.dat
2017-08-26 10:27:26 Error: Error: A fatal internal error occurred, see debug.log for details
2017-08-26 10:27:26 CDBEnv::EnvShutdown: Error -30973 shutting down database environment: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery
2017-08-26 10:27:27 Shutdown: done