Block stopped syncing-->Clear Cache-->Balance is 0

[ishijan]

Detail of the issue

I'm using Neuron V0.106. Block stopped syncing. I clicked on Clear Cache from data setting menu. Now my balance is gone as well as history transactions. I have 2 wallets and both balances are now 0. Please help me out. Thank you

bundled-ckb.log

No response

main.log

No response

status.log

No response

[Keith-CY]

Hi @ishijan
Could you upload the log of Neuron, which can be exported by Menu => Help => Export Debug Information, then we can figure out what happened under the hood.

[ishijan]

Here is debug information
neuron_debug_1678080701722.zip

[yanguoyu]

@ishijan Hi, from your log, the ckb node is restarting always, this happened because the ckb node stop signal was captured by Neuron but the ckb node start signal was missing. So neuron stopped itself because it thought ckb node stopped. It's a recently found technical issue but not mentioned in document, so the solution was missing in Neuron. The exception will be fixed by #2574 and delivered in the next version.

Now you can resolve it by these steps currently:

1. stop Neuron
2. check if ckb program is running in the task manager, close it if yes; if ckb is closed, it may not cause by the above problem.
3. start Neuron again.

[ishijan]

Stop Neuron by closing the program? After I closed the program, ckb program is not running in the tast manager. I reopened the ckb program, neuron appears in the task manager. But still not syncing. What do I do next?

[yanguoyu]

Stop Neuron by closing the program? After I closed the program, ckb program is not running in the tast manager. I reopened the ckb program, neuron appears in the task manager. But still not syncing. What do I do next?

Do you start the ckb program by yourself but not by Neuron? If you start ckb program by yourself, you may need to add --indexer parameter when starting the ckb.
If you only start Neuron and wait for a while, it also does not start syncing, you can upload logs again. Maybe there exist others problems.

[ishijan]

Sorry I meant "Neuron program".
After I closed the neuron program, neuron program is not running in the task manager. I reopened the neuron program, neuron appears in the task manager. But still not syncing. Here is the debug information.
neuron_debug_1678085252634.zip

[yanguoyu]

I'm sorry for my inaccurate description, Neuron includes neuron program, and it starts a ckb node to sync data, the program's name is ckb. After you close the neuron, you need to ensure the ckb program is closed.
This is the Neuron program:

And here is the ckb program:

[ishijan]

When Neuron program is open, the ckb program kept appearing in the task manager for a few second and then disappeared. The ckb program will appear in the task manager and disappear again after a few second. It kept going on like this.

[yanguoyu]

@ishijan Can you try to start ckb program alone? Here is the step:

First, find the mainnet data path, you can find the mainnet data path by clicking Preference->Data-> CKB Node Config & Storage, you can click and copy the path when you hover the path. Then close the Neuron program and follow these steps.

Run a mainnet node

1. visit https://github.com/nervosnetwork/ckb/releases/tag/v0.106.0, download [ckb_v0.106.0_x86_64-pc-windows-msvc.zip](https://github.com/nervosnetwork/ckb/releases/download/v0.106.0/ckb_v0.106.0_x86_64-pc-windows-msvc.zip) and unzip it
2. open a terminal and go to the unzipped ckb node directory
3. execute ./ckb run -C 'your mainnet data path' --assume-valid-target 0x4e53fcf61c1250249bc201101bcc8c904b7fcd455f8db395bdb4bbe02502a499 --indexer to start synchronization, --assume-valid-target 0x4e53fcf61c1250249bc201101bcc8c904b7fcd455f8db395bdb4bbe02502a499 is used to boost
   Ref: Run a CKB Mainnet Node

After the mainnet node start success, you can try to start Neuron again.

If this works, you can close the ckb and neuron program and try to restart the Neuron again.

[ishijan]

I downloaded ckb_v0.106.0_x86_64-pc-windows-msvc.zip and already unzipped it. I don't understand step 3. Please clarify.

[yanguoyu]

I downloaded ckb_v0.106.0_x86_64-pc-windows-msvc.zip and already unzipped it. I don't understand step 3. Please clarify.

Step 3 is used to run a ckb local node. Here is my run success example.
./ckb means run ckb in the current direction. -C 'your mainnet data path' means the ckb data is in the path. --indexer means start ckb program with ckb indexer. --assume-valid-target 0x4e53fcf61c1250249bc201101bcc8c904b7fcd455f8db395bdb4bbe02502a499 is used to boost.
And I have updated something in the comment. #2601 (comment)

[ishijan]

Step 2 - Here you want to open command prompt or open ckb-cli.exe from the unzipped folder?
Step 3- So I just opened open command prompt and type
./ckb run -C 'C:\Users\JJ\AppData\Roaming\Neuron\chains\mainnet' --indexer --assume-valid-target 0x4e53fcf61c1250249bc201101bcc8c904b7fcd455f8db395bdb4bbe02502a499
It didn't work. Which part I did wrong?

[yanguoyu]

Step 2 - Here you want to open command prompt or open ckb-cli.exe from the unzipped folder? Step 3- So I just opened open command prompt and type ./ckb run -C 'C:\Users\JJ\AppData\Roaming\Neuron\chains\mainnet' --indexer --assume-valid-target 0x4e53fcf61c1250249bc201101bcc8c904b7fcd455f8db395bdb4bbe02502a499 It didn't work. Which part I did wrong?

Can you show me what happened?
Step 2 is two combinations by two operations.

1. open a terminal
2. go to the unzipped folder in the opened terminal
   So when typing ./ckb can find the ckb.exe binary file.