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From Kiran Ayyagari <kayyag...@apache.org>
Subject Re: Database corruption, some interesting finding !
Date Mon, 25 Jan 2016 11:41:32 GMT
On Mon, Jan 25, 2016 at 5:09 PM, Emmanuel Lécharny <elecharny@gmail.com>
wrote:

> Le 25/01/16 12:33, Kiran Ayyagari a écrit :
> > On Mon, Jan 25, 2016 at 4:51 PM, Emmanuel Lécharny <elecharny@gmail.com>
> > wrote:
> >
> >> Hi guys,
> >>
> >> while working on the repair() function, iI found something very
> >> interesting.
> >>
> >> When we update a partition, at the end, we call the sync() method which
> >> writes down on disk all the updates which are pending in memory. This
> >> sync() method itself sync all the indexes :
> >>
> >>     /**
> >>      * This method is called when the synch thread is waking up, to
> write
> >>      * the modified data.
> >>      *
> >>      * @throws Exception on failures to sync database files to disk
> >>      */
> >>     public synchronized void sync() throws Exception
> >>     {
> >>         if ( !initialized )
> >>         {
> >>             return;
> >>         }
> >>
> >>         // Sync all system indices
> >>         for ( Index<?, String> idx : systemIndices.values() )
> >>         {
> >>             idx.sync();
> >>         }
> >>
> > the above call should cover this case cause JdbmRdnIndex extends
> JdbmIndex
>
> Damn it, I'm wrong... The rdnIndex is covered. Here is the list of
> system indexes :
>
> {
>     2.5.4.0=Index<objectClass>,
>     1.3.6.1.4.1.18060.0.4.1.2.3=Index<apachePresence>,
>     1.3.6.1.4.1.18060.0.4.1.2.5=Index<apacheOneAlias>,
>     1.3.6.1.4.1.18060.0.4.1.2.6=Index<apacheSubAlias>,
>     1.3.6.1.4.1.18060.0.4.1.2.7=Index<1.3.6.1.4.1.18060.0.4.1.2.7>, //
> The Alias index
>     1.3.6.1.4.1.4203.666.1.7=Index<entryCSN>,
>     1.3.6.1.4.1.18060.0.4.1.2.50=Index<1.3.6.1.4.1.18060.0.4.1.2.50>, //
> The RDN index <--------
>     2.5.18.5=Index<administrativeRole>
> }
>
> Sorry...
>
nah, you uncovered a far more serious issue with the repair tool regarding
RDN index child counts

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