Aaron T. Myers created HADOOP-10712:
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Summary: Add support for accessing the NFS gateway from the AIX
NFS client
Key: HADOOP-10712
URL: https://issues.apache.org/jira/browse/HADOOP-10712
Project: Hadoop Common
Issue Type: Bug
Components: nfs
Affects Versions: 2.4.0
Reporter: Aaron T. Myers
Assignee: Aaron T. Myers
We've identified two issues when trying to access the HDFS NFS Gateway from an
AIX NFS client:
# In the case of COMMITs, the AIX NFS client will always send 4096, or a
multiple of the page size, for the offset to be committed, even if fewer bytes
than this have ever, or will ever, be written to the file. This will cause a
write to a file from the AIX NFS client to hang on close unless the size of
that file is a multiple of 4096.
# In the case of READDIR and READDIRPLUS, the AIX NFS client will send the same
cookie verifier for a given directory seemingly forever after that directory is
first accessed over NFS, instead of getting a new cookie verifier for every set
of incremental readdir calls. This means that if a directory's mtime ever
changes, the FS must be unmounted/remounted before readdir calls on that dir
from AIX will ever succeed again.
>From my interpretation of RFC-1813, the NFS Gateway is in fact doing the
>correct thing in both cases, but we can introduce simple changes on the NFS
>Gateway side to be able to optionally work around these incompatibilities.
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