Database corrupted after restart

[kwunyeung]

Version

v0.3.1

Process to replicate the issue

1. stop the node
2. edit the configuration file
3. replace a new wallet file
4. start the node

Stack trace

Jul 08 08:20:08 v-systems vsys[53777]: INFO  vsys.Application$ - Starting...
Jul 08 08:20:09 v-systems vsys[53777]: INFO  kamon.Kamon$Instance - Initializing Kamon...
Jul 08 08:20:10 v-systems vsys[53777]: INFO  a.event.slf4j.Slf4jLogger - Slf4jLogger started
Jul 08 08:20:10 v-systems vsys[53777]: INFO  vsys.Application$ - VSYS Core v0.3.1 Blockchain Id: M
Jul 08 08:20:10 v-systems vsys[53777]: DEBUG vsys.db.package$ - Open DB at /var/lib/vsys/.vsys/data
Jul 08 08:20:29 v-systems systemd[1]: vsys.service: Main process exited, code=killed, status=9/KILL
Jul 08 08:20:29 v-systems systemd[1]: vsys.service: Failed with result 'signal'.

Other information

It works fine if I remove the /data directory and resync again.

[faddat]

Were you using the .jar file, or the .Deb?

What OS?

What Java version?

Also, what prompted the restart? Is it like a local node on your laptop? I have experienced this when running vsys on my MacBook.

Thanks!

[kwunyeung]

I figured that out is actually due to not enough memory. As the chain data getting larger, it will use more memory to start the node. Can the memory usage on starting the node can be reduced? Otherwise, it will not be sustainable in a long run.

[faddat]

How much RAM is on your node?

I haven't had this issue but my nodes tend to be quite large (128gb or 64gb) so I'm curious where the limitation is.

Thanks.

[ncying]

@kwunyeung you can change the
blockchain {
minimum-in-memory-diff-blocks = 3600 => minimum-in-memory-diff-blocks = 1000 or less
}
in .conf file, if you really need to run the node in a machine with less memory.

[kwunyeung]

@faddat I was trying to sync a backup node with less resources. Tried to start with a 4GB box. It's not easy to always get a 64GB machines 😅 .

[90hacker]

I also had the same problem.
8g RAM。minimum-in-memory-diff-blocks I set it to 100 but it can't start。
VSYS Core v0.3.2。