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glfs: retry 5 times to wait the meta data updated successfully #546

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glfs: retry 5 times to wait the meta data updated successfully #546

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Commits on Apr 16, 2019

  1. glfs: retry 5 times to wait the meta data updated successfully 

    For the 'gluster-block modify' we can hit one issue in the same
client with multi-precesses, here is the gluster-blockd and
tcmu-runner.

We do glfs_ftruncate in gluster-blockd to resize the volume file
and then in tcmu-runner to check the size by using the glfs_lstat
but get the old size, which hasn't been updated yet.

But from the mountpoint's ls command, we can see that the size is
already upated to new one.

Here we will went to wait for most 5 seconds and retry 5 times to
make sure the cache has been flushed successfully to the volume.

Fixes: gluster/gluster-block#204
Signed-off-by: Xiubo Li <[email protected]>
    @lxbsz
    lxbsz committed Apr 16, 2019
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