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The existing system was unable to resume without manual intervention if it stalled for more than 7.5 minutes. After this time, no peers would have "recent' blocks, which are prerequisites for synchronization and minting. This new code monitors for such a situation, and enters "recovery mode" if there are no peers with recent blocks for at least 10 minutes. It also requires that there is at least one connected peer, to reduce false positives due to bad network connectivity. Once in recovery mode, peers with no recent blocks are added back into the pool of available peers to sync with, and restrictions on minting are lifted. This should allow for peers to collaborate to bring the chain back to a "recent" block height. Once we have a peer with a recent block, the node will exit recovery mode and sync as normal. Previously, lifting minting restrictions could have increased the risk of extra forks, however it is much less risky now that nodes no longer mint multiple blocks in a row. In all cases, minBlockchainPeers is used, so a minimum number of connected peers is required for syncing and minting in recovery mode, too.
Qortal Project - Official Repo
Build / run
- Requires Java 11. OpenJDK 11 recommended over Java SE.
- Install Maven
- Use Maven to fetch dependencies and build:
mvn clean package - Built JAR should be something like
target/qortal-1.0.jar - Create basic settings.json file:
echo '{}' > settings.json - Run JAR in same working directory as settings.json:
java -jar target/qortal-1.0.jar - Wrap in shell script, add JVM flags, redirection, backgrounding, etc. as necessary.
- Or use supplied example shell script: start.sh