EveryTime, API is crushed

[username1565]

Everytime, by some timeout, API is crushed, and restarted then.
In console of server-backend, I see this:

2021-02-15 01:22:39 [api] Stat collection broadcastLiveStats: 8 ms 

ReplyError: EXECABORT Transaction discarded because of previous errors. 
at parseError (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:179:12) 
at parseType (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:302:14) 


ReplyError: EXECABORT Transaction discarded because of previous errors. 
at parseError (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:179:12) 
at parseType (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:302:14) 


ReplyError: EXECABORT Transaction discarded because of previous errors. 
at parseError (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:179:12) 
at parseType (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:302:14) 


ReplyError: EXECABORT Transaction discarded because of previous errors. 
at parseError (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:179:12) 
at parseType (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:302:14) 


ReplyError: EXECABORT Transaction discarded because of previous errors. 
at parseError (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:179:12) 
at parseType (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:302:14) 


ReplyError: EXECABORT Transaction discarded because of previous errors. 
at parseError (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:179:12) 
at parseType (/cryptonote-nodejs-pool/node_modules/redis-parser/lib/parser.js:302:14) 

2021-02-15 01:22:44 [master] API died, spawning replacement... 
(node:23359) ExperimentalWarning: queueMicrotask() is experimental.

What does this mean?

[username1565]

This something with redis, because after google this:
ReplyError: EXECABORT Transaction discarded because of previous errors.
And according this: https://stackoverflow.com/a/54063543

This can also happen due to empty multi command.
running redis-cli monitor I saw

1546789398.881549 [0 the-ip] "multi"
1546789398.881575 [0 the-ip] "exec"

Before executing multi, make sure that you have at least 1 command to execute on the transaction.

Somewhere, after try to get status, from redis, redis-monitor show twice:

1546789398.881549 [0 the-ip] "multi"
1546789398.881575 [0 the-ip] "exec"
1546789398.881549 [0 the-ip] "multi"
1546789398.881575 [0 the-ip] "exec"

and then, api crushed, and restarting again.

Anyone know, how to fix this? I see some functions by keyword multi, here: https://github.com/dvandal/cryptonote-nodejs-pool/search?p=2&q=multi&type=

[username1565]

I found an error, related with this issue, and found this, at this line:

cryptonote-nodejs-pool/lib/api.js

Line 2101 in f5f82d1

lastResponse: JSON.stringify(error ? error : response)

Some bullshit there, and this value is undefined.
I just changed this to:

lastResponse: JSON.stringify(error ? error : response) || 'ok' //it's "undefined"!

After this, changes, API have no crushes every time, after some timeout.

This do tryes to write undefined, into redis-server, and API got crushes every time, because of this,
and restarting again and again, and again, and again...

P.S.:
Why this value is undefined, I do not know,
but by adding the line:

console.warn(redisCommands, error, response); //before next line
redisClient.multi(redisCommands).exec();

I see, this undefined, after try to getStatus from wallet, while the daemon have some response, there, and this is not undefined.
Maybe, need to use some another, different API-calls, for different wallet-API.

[username1565]

I did try to get status, of wallet, by using wallet-API, and did try to get this, using url http://wallet_API_IP:PORT/status,
and I see in console of wallet API, some message, about X-API-KEY does not exists.

So, maybe, because of this, undefined-value was been returned there, from wallet-api.