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From "Davis, Daniel (NIH/NLM) [C]" <daniel.da...@nih.gov>
Subject PingRequestHandler and file corruption
Date Fri, 28 Aug 2015 18:17:05 GMT
This is a resend to correct my awful subject.

From: Davis, Daniel (NIH/NLM) [C]
Sent: Friday, August 28, 2015 2:15 PM
To: solr-user@lucene.apache.org
Subject: ping handler very doubtful

So, I tested that the PingRequestHandler works in the following fashion:

            cd server/corename/data/index
            # some work with ls and awk to produce a script, and then it runs
dd if=/dev/urandom of=`pwd`/segments_10 bs=160 count=1
dd if=/dev/urandom of=`pwd`/_u.fdt bs=41512 count=1
dd if=/dev/urandom of=`pwd`/_u.fdx bs=100 count=1
dd if=/dev/urandom of=`pwd`/_u.fnm bs=1573 count=1
dd if=/dev/urandom of=`pwd`/_u_Lucene50_0.doc bs=16824 count=1
dd if=/dev/urandom of=`pwd`/_u_Lucene50_0.pos bs=17677 count=1
dd if=/dev/urandom of=`pwd`/_u_Lucene50_0.tim bs=54010 count=1
dd if=/dev/urandom of=`pwd`/_u_Lucene50_0.tip bs=1466 count=1
dd if=/dev/urandom of=`pwd`/_u.nvd bs=966 count=1
dd if=/dev/urandom of=`pwd`/_u.nvm bs=140 count=1
dd if=/dev/urandom of=`pwd`/_u.si bs=409 count=1

This did not cause any immediate problems with the PingRequestHandler because the query was
cached.
Worth a bug?

It did of course cause problems for the health monitor following RELOAD or complete solr restart;
which was enough for me.

Dan Davis, Systems/Applications Architect (Contractor),
Office of Computer and Communications Systems,
National Library of Medicine, NIH


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