ivankelly / bookkeeper-tutorial Goto Github PK

Exception in thread "main" org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /ledgers/available/readonly
at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
at org.apache.bookkeeper.client.BookieWatcher$ReadOnlyBookieWatcher.(BookieWatcher.java:264)
at org.apache.bookkeeper.client.BookieWatcher.(BookieWatcher.java:85)
at org.apache.bookkeeper.client.BookKeeper.(BookKeeper.java:219)
at org.apache.bookkeeper.Dice.(Dice.java:54)
at org.apache.bookkeeper.Dice.main(Dice.java:233)

The tag for the source code of the Tailing section has a typo and is called "trailing" instead of "tailing" what causes the link to the source code in that section to redirect to a 404 page in github

The current readme still points to zookeeper.apache.org.

If Dice.playdice() drops into the follow branch before the takeLeadership callback occurs then the program hangs without generating any dice rolls.

This is because the first block of code in follow() has a loop condition that never breaks out.
ie "while (ledgers == null) "

A potential solution is to change the condition to so that one the leadership
"while (ledgers == null && !leader)"

Or is this additional check wrong for some reason?

It will be useful to add a functionality to the dice to wait until the bookkeeper ensemble is ready in order to avoid 3rd scripts in the docker file.

This new feature will permit to run the tutorial easier using docker compose

Ref: apache/bookkeeper#328