[fix][broker] URL-encode sub-name in Txn pending-ack topic #25727
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shibd merged 1 commit intoapache:masterfrom May 9, 2026
Merged
[fix][broker] URL-encode sub-name in Txn pending-ack topic #25727shibd merged 1 commit intoapache:masterfrom
shibd merged 1 commit intoapache:masterfrom
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…pport '/' in sub names
Subscription names containing '/' caused TopicName.get() to throw
IllegalArgumentException ("V1 topic names are no longer supported")
when opening the transaction pending-ack store, because the extra
slashes created four path segments instead of three.
Fix: URL-encode the subscription name in
MLPendingAckStore.getTransactionPendingAckStoreSuffix() before
appending it to the topic name. TopicName always Codec.decode()s
the local-name on parse and re-encodes it on output, so there is
no double-encoding. Also remove the pre-emptive Codec.encode() call
in PersistentTopic.unsubscribe() that was added as a workaround.
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Motivation
When a subscription name contains
/(e.g. a Pulsar Function's fully-qualified name liketenant/namespace/function), opening the transaction pending-ack store fails with:Root cause:
MLPendingAckStore.getTransactionPendingAckStoreSuffix()appends the raw subscription name to the topic name string. When the result is passed toTopicName.get(), the extra/characters produce four path segments, whichTopicNamemisidentifies as a deprecated V1 (cluster-scoped) name and throws synchronously.Changes
MLPendingAckStore.getTransactionPendingAckStoreSuffix(): URL-encode the subscription name withCodec.encode()before appending it.TopicNamealwaysCodec.decode()s the local-name on parse and re-encodes it on output (getPersistenceNamingEncoding()), so there is no double-encoding and the managed-ledger path is correct.PersistentTopic.unsubscribe(): Remove the pre-emptiveCodec.encode()call — encoding is now done centrally ingetTransactionPendingAckStoreSuffix().Verifying this change
All tests passed
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