Attachment 911931 Details for Bug 1110694 – Rebalane-Race

Rebalane-Race

rebalance-race (text/plain), 1.54 KB, created by vsomyaju on 2014-06-25 06:51:01 UTC

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Creator: vsomyaju

Created: 2014-06-25 06:51:01 UTC

Size: 1.54 KB

patch

obsolete

>From the logs, it seems to be a race condition between two rebalance prcocess.
>
>
>STATE 1:                          BRICK-1     
>only one brick                   Cached File
>in the system
>
>STATE 2:
>Add brick-2                       BRICK-1                BRICK-2
>
>
>STATE 3:                                                Lookup of File on brick-2
>                                                        by this node's rebalance
>                                                        will fail because hashed 
>							file is not created yet.
>                                                        So dht_lookup_everywhere is 
>                                                        about to call.
>
>
>STATE 4:                         As part of lookup
>                                 link file at brick-2
>                                 will be created.
>
>
>STATE 5:                         getxattr to check that
>                                 cached file belongs to 
>                                 this node is done
>
>
>STATE 6:                                                dht_lookup_everywhere_cbk detects
>                                                        the link created by rebalance-1.
>                                                        It will unlink it.
>
>
>STATE 7:                        getxattr at the link
>                                file with "pathinfo" key
>                                will be called will fail 
>                                as the link file is deleted
>                                by rebalance on node-2
>

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Attachments on bug 1110694: 911931