Ancient blocks are not downloaded, stuck at #57

[alexdupre]

• Parity Ethereum version: 2.0.6
• Operating system: FreeBSD
• Installation: built from source
• Fully synchronized: yes
• Network: ethereum mainnet

Actual behavior

The client correctly downloads the snapshot and sync until the most recent block, but ancient blocks are not downloaded correctly and are stuck at block number 57, even after waiting many hours and after restarting the client:

% http http://localhost:8545/ jsonrpc=2.0 id:=1 method=parity_chainStatus params:='[]'
HTTP/1.1 200 OK
Content-Type: application/json
Date: Fri, 21 Sep 2018 07:36:26 GMT
Transfer-Encoding: chunked

{
    "id": 1,
    "jsonrpc": "2.0",
    "result": {
        "blockGap": [
            "0x3a",
            "0x60e4b1"
        ]
    }
}

Log file: parity-sync.txt

Expected behavior

Ancient blocks download should run.

Steps to reproduce

Run the client with default configuration (warp sync).

[jam10o-new]

Hey, you may want to follow #9306

Closing this issue as it's a duplicate.