Mempool unusable without Electrum

[tlindi]

Describe the bug
mempool starts but can't show any info if electrum is not running.

Expected behavior
mempool open and show "some info" as @tehelsper says here : it should

Screenshots

Desktop (please complete the following information):

• Browser Brave
• Version latest

MyNode hardware (please complete the following information):

• Device: Raspi4
• Version 0.3.41

Additional context

• Knots v29.2 pruned
• Electrum Service is Disabled, cause it doesn't start on pruned bitcoin backend.
• Bitcoin Peer Block Filters (BIP 157) - Enabled
• Block Filters (BIP 158) - Enabled
• Bitcoin is synced

Mempool Log:

Mempool Status
* Running Running Containers: mempool_web_1 mempool_db_1 mempool_api_1
Feb 18 17:14:39 mynode mempool[14142]: api_1  | Feb 18 15:14:39 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:39 mynode mempool[14142]: api_1  | Feb 18 15:14:39 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:39 mynode mempool[14142]: api_1  | Feb 18 15:14:39 [162] INFO: Disconnected from Electrum Server at 172.26.0.1:50001
Feb 18 17:14:38 mynode mempool[14142]: api_1  | Feb 18 15:14:38 [162] ERR: $updateBlocks stalled at "getting block data for 937230"
Feb 18 17:14:38 mynode mempool[14142]: api_1  | Feb 18 15:14:38 [162] INFO: Disconnected from Electrum Server at 172.26.0.1:50001
Feb 18 17:14:38 mynode mempool[14142]: api_1  | Feb 18 15:14:38 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:38 mynode mempool[14142]: api_1  | Feb 18 15:14:38 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:37 mynode mempool[14142]: api_1  |     at async Server.runMainUpdateLoop (/backend/package/index.js:253:38)
Feb 18 17:14:37 mynode mempool[14142]: api_1  |     at async Blocks.$updateBlocks (/backend/package/api/blocks.js:849:34)
Feb 18 17:14:37 mynode mempool[14142]: api_1  |     at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
Feb 18 17:14:37 mynode mempool[14142]: api_1  |     at Blocks.$getTransactionsExtended (/backend/package/api/blocks.js:175:23)
Feb 18 17:14:37 mynode mempool[14142]: api_1  | Feb 18 15:14:37 [162] WARN: Exception in runMainUpdateLoop() (count: 550). Retrying in 1 sec. Reason: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.. Stack trace: Error: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.
Feb 18 17:14:37 mynode mempool[14142]: api_1  | Feb 18 15:14:37 [162] ERR: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.
Feb 18 17:14:37 mynode mempool[14142]: api_1  | Feb 18 15:14:37 [162] ERR: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.
Feb 18 17:14:37 mynode mempool[14142]: api_1  | Feb 18 15:14:37 [162] ERR: $updateBlocks stalled at "getting block data for 937230"
Feb 18 17:14:37 mynode mempool[14142]: api_1  | Feb 18 15:14:37 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:37 mynode mempool[14142]: api_1  | Feb 18 15:14:37 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:37 mynode mempool[14142]: api_1  | Feb 18 15:14:37 [162] INFO: Disconnected from Electrum Server at 172.26.0.1:50001
Feb 18 17:14:36 mynode mempool[14142]: api_1  | Feb 18 15:14:36 [162] INFO: Disconnected from Electrum Server at 172.26.0.1:50001
Feb 18 17:14:36 mynode mempool[14142]: api_1  | Feb 18 15:14:36 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:36 mynode mempool[14142]: api_1  | Feb 18 15:14:36 [162] ERR: Electrum error: {"errno":-111,"code":"ECONNREFUSED","syscall":"connect","address":"172.26.0.1","port":50001}
Feb 18 17:14:35 mynode mempool[14142]: api_1  |     at async Server.runMainUpdateLoop (/backend/package/index.js:253:38)
Feb 18 17:14:35 mynode mempool[14142]: api_1  |     at async Blocks.$updateBlocks (/backend/package/api/blocks.js:849:34)
Feb 18 17:14:35 mynode mempool[14142]: api_1  |     at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
Feb 18 17:14:35 mynode mempool[14142]: api_1  |     at Blocks.$getTransactionsExtended (/backend/package/api/blocks.js:175:23)
Feb 18 17:14:35 mynode mempool[14142]: api_1  | Feb 18 15:14:35 [162] WARN: Exception in runMainUpdateLoop() (count: 549). Retrying in 1 sec. Reason: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.. Stack trace: Error: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.
Feb 18 17:14:35 mynode mempool[14142]: api_1  | Feb 18 15:14:35 [162] ERR: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.
Feb 18 17:14:35 mynode mempool[14142]: api_1  | Feb 18 15:14:35 [162] ERR: Cannot fetch tx 01f0dba838332c63fb53a56c5a0724ff5770ebc9b51184ecda38d8fe39e31121. Reason: No such mempool transaction. Use -txindex or provide a block hash to enable blockchain transaction queries. Use gettransaction for wallet transactions.
Feb 18 17:14:35 mynode mempool[14142]: api_1  | Feb 18 15:14:35 [162] ERR: $updateBlocks stalled at "getting block data for 937230"

[tehelsper]

With a pruned backend on Knots, I can't guarantee any apps works as expected. There's another issue where new Knots versions cause electrum initial sync to stop part way through and slow down - it may be a rate limiting thing but it needs more investigation.