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https://issues.apache.org/jira/browse/SOLR-830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644037#action_12644037
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Steven Rowe commented on SOLR-830:
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>From the egrep(1) man page:
{noformat}
Traditional egrep did not support the { metacharacter, and some egrep
implementations support \{ instead, so portable scripts should avoid {
in egrep patterns and should use [{] to match a literal {.
{noformat}
Perl is pretty portable, and has a stable regex language - how about (untested):
{code}
snap_name=`ssh -o StrictHostKeyChecking=no ${master_host} \
"perl -e 'chdir q/${master_data_dir}/; print ((sort grep
{/^snapshot[.][1-9][0-9]{13}\$/} <*>)[-1])'"`
{code}
> snappuller picks bad snapshot name
> ----------------------------------
>
> Key: SOLR-830
> URL: https://issues.apache.org/jira/browse/SOLR-830
> Project: Solr
> Issue Type: Bug
> Components: replication (scripts)
> Affects Versions: 1.2, 1.3
> Reporter: Hoss Man
> Assignee: Bill Au
>
> as mentioned on the mailing list...
> http://www.nabble.com/FileNotFoundException-on-slave-after-replication---script-bug--to20111313.html#a20111313
> {noformat}
> We're seeing strange behavior on one of our slave nodes after replication.
> When the new searcher is created we see FileNotFoundExceptions in the log
> and the index is strangely invalid/corrupted.
> We may have identified the root cause but wanted to run it by the community.
> We figure there is a bug in the snappuller shell script, line 181:
> snap_name=`ssh -o StrictHostKeyChecking=no ${master_host} "ls
> ${master_data_dir}|grep 'snapshot\.'|grep -v wip|sort -r|head -1"`
> This line determines the directory name of the latest snapshot to download
> to the slave from the master. Problem with this line is that it grab the
> temporary work directory of a snapshot in progress. Those temporary
> directories are prefixed with "temp" and as far as I can tell should never
> get pulled from the master so its easy to disambiguate. It seems that this
> temp directory, if it exists will be the newest one so if present it will be
> the one replicated: FAIL.
> {noformat}
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