stack backtrace: Ubuntu 17.04

[nickhill]

Before filing a new issue, please provide the following information.

I'm running:

• Which Parity version?: 0.0.0
• Which operating system?: Windows / MacOS / Linux
• How installed?: via installer / homebrew / binaries / from source
• Are you fully synchronized?: no / yes
• Did you try to restart the node?: no / yes

Your issue description goes here below. Try to include actual vs. expected behavior and steps to reproduce the issue.
@machine:~/src/ethereum/parity/parity$ target/release/parity
2018-01-07 22:54:41 Starting Parity/v1.9.0-unstable-c37a87e49-20180105/x86_64-linux-gnu/rustc1.23.0
2018-01-07 22:54:41 Keys path /home//.local/share/io.parity.ethereum/keys/Foundation
2018-01-07 22:54:41 DB path /home//.local/share/io.parity.ethereum/chains/ethereum/db/906a34e69aec8c0d
2018-01-07 22:54:41 Path to dapps /home//.local/share/io.parity.ethereum/dapps
2018-01-07 22:54:41 State DB configuration: fast
2018-01-07 22:54:41 Operating mode: active
2018-01-07 22:54:41 Configured for Foundation using Ethash engine
2018-01-07 22:54:41 Updated conversion rate to Ξ1 = US$1214.10 (98054216 wei/gas)

====================

stack backtrace:
0: 0x561dbf20dc8c - backtrace::backtrace::trace::h88dff4dc401d81d6
1: 0x561dbf20dcc2 - backtrace::capture::Backtrace::new::hc1bdbce336b16eca
2: 0x561dbe6a0f89 - panic_hook::panic_hook::ha4f6f84d07d9cbbd

Thread 'main' panicked at 'Unexpected rlp error: RlpExpectedToBeData', /checkout/src/libcore/result.rs:906

This is a bug. Please report it at:

https://github.com/paritytech/parity/issues/new

====================

restarts have identical results but for stack addresses:

@machine:~/src/ethereum/parity/parity$ target/release/parity
2018-01-07 23:28:14 Starting Parity/v1.9.0-unstable-c37a87e49-20180105/x86_64-linux-gnu/rustc1.23.0
2018-01-07 23:28:14 Keys path /home//.local/share/io.parity.ethereum/keys/Foundation
2018-01-07 23:28:14 DB path /home//.local/share/io.parity.ethereum/chains/ethereum/db/906a34e69aec8c0d
2018-01-07 23:28:14 Path to dapps /home//.local/share/io.parity.ethereum/dapps
2018-01-07 23:28:14 State DB configuration: fast
2018-01-07 23:28:14 Operating mode: active
2018-01-07 23:28:14 Configured for Foundation using Ethash engine
2018-01-07 23:28:14 Updated conversion rate to Ξ1 = US$1213.48 (98104300 wei/gas)

====================

stack backtrace:
0: 0x558b71d3bc8c - backtrace::backtrace::trace::h88dff4dc401d81d6
1: 0x558b71d3bcc2 - backtrace::capture::Backtrace::new::hc1bdbce336b16eca
2: 0x558b711cef89 - panic_hook::panic_hook::ha4f6f84d07d9cbbd

Thread 'main' panicked at 'Unexpected rlp error: RlpExpectedToBeData', /checkout/src/libcore/result.rs:906

This is a bug. Please report it at:

https://github.com/paritytech/parity/issues/new

Aborted

==================== CONFIGURATIONS ====================

lsb_release -a
LSB Version: core-9.20160110ubuntu5-amd64:core-9.20160110ubuntu5-noarch:security-9.20160110ubuntu5-amd64:security-9.20160110ubuntu5-noarch
Distributor ID: Ubuntu
Description: Ubuntu 17.04
Release: 17.04
Codename: zesty

====================

installation via git, likley > 1 year ago

git status
On branch master
Your branch is up-to-date with 'origin/master'.
nothing to commit, working tree clean

====================

@machine:~/src/ethereum/parity/parity$ rustup -V
rustup 1.9.0 (57fc3c087 2018-01-04)

@machine:~/src/ethereum/parity/parity$ rustc -V
rustc 1.23.0 (766bd11c8 2018-01-01)

====================

I am NOT synchronized, likely 3-4 months behind.

==================== NOTES ====================

My system lacked this directory:
/home//.local/share/io.parity.ethereum/keys/Foundation

creating it made no difference.

==================== SUBOPTIMAL SOLUTION ====================

Removal of /home//.local/share/io.parity.ethereum
and restarting resulted in apparent success, peers were found and parity began
pulling in the chain.

Thereafter, replacing the newly created /home//.local/share/io.parity.ethereum
directory with the pre-existing one again resulted in the rlp error.
So the issue seems to be caused by something therein, something about
older builds.

[lght]

Am I understanding correctly that the panic happened using the latest build from master on a data directory (.local/share/io.parity.ethereum) that was created from another git build from >1 year ago?

Can you provide a tar file of the manifest files and a few of the sst file from your old database directory .local/share/io.parity.ethereum/chains/ethereum/db?

For example:

cd .local/share/io.parity.ethereum/chains/ethereum/db/{Some-hash-value}/overlayrecent/db
tar --xz -cf db-sample.tar.xz CURRENT MANIFEST-{some-numbers} OPTIONS-{some-numbers} first.sst second.sst

Where first.sst and second.sst would be the first two lowest numbered sst files. Feel free to include more more sst files.

Could you also please provide your old data directory structure?

ls -R .local/share/io.parity.ethereum

[nickhill]

Am I understanding correctly that the panic happened using the latest build from master on a data directory (.local/share/io.parity.ethereum) that was created from another git build from >1 year ago?

Yes, correct.

Can you provide a tar file of the manifest files and a few of the sst file from your old database directory .local/share/io.parity.ethereum/chains/ethereum/db?

Yes, but the upload limit here is 10MB, even via xz the file size is too great to include even the second .sst. Also, the github selector does not accept .xz files, so I mv issue-7493_db-sample.tar.{xz,zip} . Please advise as to another method and I will provide all 150 .sst files if need be. Compression was performed as you indicated, tar --xz -cf issue-7493_db-sample.tar.xz CURRENT MANIFEST-204941 OPTIONS* 000860.sst
issue-7493_db-sample.tar.zip

Could you also please provide your old data directory structure?
Yes, included
issue-7493_data_directory_structure.txt

[nickhill]

Also - identical behavior for classic chain, similarly out of sync

[nickhill]

starting from scratch, to an SSD, full sync was achieved with today's build Parity/v1.10.0-unstable-24a40af5b-20180115/x86_64-linux-gnu/rustc1.23.0 in 1hour, 13 minutes. Very nice

[5chdn]

Duplicate of #7188

[lght]

@nickhill thank you for the database sample, and directory structure. Since this issue has been marked as a duplicate, please follow progress of #7188 if still interested.

[nickhill]

understood, thank you