This post captures a MongoDB error I see frequently when trying to run Bitcore Node. Of course, I run my own Dockerized version targeted for BCH: docker-bitcore-node.
This page is liked to by my research page on Bitcore Node.
This error is frequently seen when trying to start the Docker container. It's occurs because the DB is so big (over 320GB). It takes a while for MongoDB to open the database. However, the Bitcore Node application comes up much faster. So Bitcore tends to error out. This is why I have the Docker container set to auto-restart. It will keep trying until MongoDB gets the DB online.
(node:62) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
error: MongoNetworkError: connection 0 to 172.17.0.1:3503 closed
at Socket.<anonymous> (/home/safeuser/bitcore/packages/bitcore-node/node_modules/mongodb-core/lib/connection/connection.js:275:9)
at Object.onceWrapper (events.js:277:13)
at Socket.emit (events.js:189:13)
at TCP._handle.close (net.js:597:12)
error: MongoNetworkError: connection 1 to 172.17.0.1:3503 closed
at Socket.<anonymous> (/home/safeuser/bitcore/packages/bitcore-node/node_modules/mongodb-core/lib/connection/connection.js:275:9)
at Object.onceWrapper (events.js:277:13)
at Socket.emit (events.js:189:13)
at TCP._handle.close (net.js:597:12)
error: MongoNetworkError: connection 2 to 172.17.0.1:3503 closed
at Socket.<anonymous> (/home/safeuser/bitcore/packages/bitcore-node/node_modules/mongodb-core/lib/connection/connection.js:275:9)
at Object.onceWrapper (events.js:277:13)
at Socket.emit (events.js:189:13)
at TCP._handle.close (net.js:597:12)
error: MongoNetworkError: connection 3 to 172.17.0.1:3503 closed
at Socket.<anonymous> (/home/safeuser/bitcore/packages/bitcore-node/node_modules/mongodb-core/lib/connection/connection.js:275:9)
at Object.onceWrapper (events.js:277:13)
at Socket.emit (events.js:189:13)
at TCP._handle.close (net.js:597:12)
error: MongoNetworkError: connection 4 to 172.17.0.1:3503 closed
at Socket.<anonymous> (/home/safeuser/bitcore/packages/bitcore-node/node_modules/mongodb-core/lib/connection/connection.js:275:9)
at Object.onceWrapper (events.js:277:13)
at Socket.emit (events.js:189:13)
at TCP._handle.close (net.js:597:12)
error: MongoNetworkError: connection 5 to 172.17.0.1:3503 closed
at Socket.<anonymous> (/home/safeuser/bitcore/packages/bitcore-node/node_modules/mongodb-core/lib/connection/connection.js:275:9)
at Object.onceWrapper (events.js:277:13)
at Socket.emit (events.js:189:13)
at TCP._handle.close (net.js:597:12)
Unhandled Rejection at: Error: Failed to connect to database
at Timeout.setInterval (/home/safeuser/bitcore/packages/bitcore-node/build/src/services/storage.js:53:32)
at process._tickCallback (internal/process/next_tick.js:68:7)
Shutting down 62
info: Stopping P2P Manager
info: Stopping Event Service