Anu Engineer created HDFS-11921:
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Summary: Ozone: KSM: Unable to put keys with zero length
Key: HDFS-11921
URL: https://issues.apache.org/jira/browse/HDFS-11921
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ozone
Affects Versions: HDFS-7240
Reporter: Anu Engineer
Priority: Minor
As part of working on HDFS-11909, I was trying to put zero length keys. I found
that put key refuses to do that. Here is the call trace,
bq. at ScmBlockLocationProtocolClientSideTranslatorPB.allocateBlock
we check if the block size is greater than 0, which makes sense since we should
not call into SCM to allocate a block of zero size.
However these 2 calls are invoked for creating the key, so that metadata for
key can be created, we should probably take care of this behavior here.
bq. ksm.KeyManagerImpl.allocateKey
bq. ksm.KeySpaceManager.allocateKey(KeySpaceManager.java:428)
Another way to fix this might be to just allocate a block with at least 1 byte
always, which might be easier than special casing code.
[~vagarychen] Would you like to fix this in the next patch you are working on ?
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