Node not starting

Question

Hi,

I had a multichain setup with 4 nodes, 2 of my nodes have gone down after 2 days. Now when I try to restart these nodes, I get an error like below at both nodes:-

 "ERROR: Couldn't initialize permission database for blockchain <chain-name>. Probably multichaind for this blockchain is already running. Exiting...".

But no multichain process is running at any of the nodes.

I am using alpha 19 version of multichain, can you please help?

Thanks.

Comments

One more question - when you say the node went down, was this because MultiChain itself crashed or because the host servers/instances went down?

Answer 1

Try running multichaind with reindex=1 which should clear up the database.

Can you give me any guidance on the volume of transactions you were running when the node went down?

Comments

I tried with multichaind <chain-name>@<ip>:<port> -reindex=1 but still get the same error message.

Also the number of transaction on the blockchain other than coinbase transactions are quite low - just a 2 digit number.

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If multichaind is not running, it is likely permission database is corrupted as a result of node crash or multichaind was killed while the database was in inconsistent state. You can see the error in the end of permissions.log file.

You can remove permissions.* and entities.* from multichain directory and restart multichaind with -reindex=1

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Yes works after removing permissions and entities files. Thanks.

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FYI the latest alpha 20 automatically does this for you when reindex=1.