Ledger can't be opened or closed due to zero-length metadata
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Key: BOOKKEEPER-153
URL: https://issues.apache.org/jira/browse/BOOKKEEPER-153
Project: Bookkeeper
Issue Type: Bug
Components: bookkeeper-client
Affects Versions: 4.0.0
Reporter: Sijie Guo
Assignee: Sijie Guo
Fix For: 4.1.0
Currently creating ledger path and writing ledger metadata are not in a
transaction. so if the bookkeeper client (hub server uses bookkeeper client) is
crashed, we have a ledger existed in zookeeper with zero-length metadata. we
can't open/close it.
we should create the ledger path with initial metadata to avoid such case.
besides that, we need to add code in openLedgerOp to handle zero-length
metadata for backward compatibility.
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