Server not start up, Error: checksum mismatch

[young118]

What's going wrong?

I have a pilosa server running in docker. There is another process keep inserting data into pilosa, and pilosa runs normally for like 2 weeks, but someday suddenly pilosa can not start up, docker logs shows the following error: Error: running server: opening server: opening Holder: open index: name=packet_packet, err=opening fields: open field: name=_exists, err=opening views: opening view: view=standard, err=opening fragments: open fragment: shard=5, err=opening storage: unmarshal storage: file=/data/packet_packet/_exists/views/standard/fragments/5, err=unmarshaling as pilosa roaring: checksum mismatch: type 0, exp=c8e581ff, got=00000000, could anyone tell me what does this mean and how to resolve it, thanks.

What was expected?

I wanna know why this happened and how to fix it.

Steps to reproduce the behavior

Sorry I really don't know how to reproduce it, I keep inserting almost the same data into pilosa, and there isn't any inappropriate operation on the server these days.

Information about your environment (OS/architecture, CPU, RAM, cluster/solo, configuration, etc.)

OS: ubuntu18.04 CPU:4 core RAM: 16GB solo default configuration

[seebs]

Is it possible that you ran out of disk space (possibly temporarily) on that machine?

How large is the file it's reporting this on (the fragments/5 file) in bytes?

[young118]

@seebs The docker container is down, I can't check the size of fragments/5 now, but I'm pretty sure that I did not ran out of disk space, the total disk usage is just 40G

[young118]

I know what caused this now, it was the ungracefully shutting down. I can not control how my client use my product, so my question is, how can I recover data from this? Thanks