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https://issues.apache.org/jira/browse/ACCUMULO-4541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15796436#comment-15796436
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Christopher Tubbs commented on ACCUMULO-4541:
---------------------------------------------
{{ScanCommand::execute}} does something like the following:
{code:java}
if (printFile != null) {
printFile.close();
}
{code}
{{GrepCommand::execute}} does not call close. I'm guessing close flushes.
> shell `grep -o` writes incomplete files
> ---------------------------------------
>
> Key: ACCUMULO-4541
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4541
> Project: Accumulo
> Issue Type: Bug
> Components: shell
> Affects Versions: 1.6.6, 1.7.2
> Reporter: Michael Berman
> Fix For: 1.7.3, 1.8.1, 2.0.0
>
>
> {{grep -o}} appears to be writing truncated files. missing a flush, maybe? i
> do not observe the same behavior with {{scan -o}}
> {code}
> $ accumulo shell ... -e 'grep a -t tablename -np -o /tmp/grep_-o.out'
> 2016-12-21 23:38:29,350 [client.ClientConfiguration] WARN : Found no
> client.conf in default paths. Using default client configuration values.
> 2016-12-21 23:38:29,358 [client.ClientConfiguration] WARN : Found no
> client.conf in default paths. Using default client configuration values.
> 2016-12-21 23:38:31,488 [client.ClientConfiguration] WARN : Found no
> client.conf in default paths. Using default client configuration values.
> 2016-12-21 23:38:31,763 [trace.DistributedTrace] INFO : SpanReceiver
> org.apache.accumulo.tracer.ZooTraceClient was loaded successfully.
> $ accumulo shell ... -e 'grep a -t tablename -np' > /tmp/grep_redirect.out
> $ wc /tmp/grep_*.out
> 44030 194670 4669440 /tmp/grep_-o.out
> 44165 195171 4761183 /tmp/grep_redirect.out
> {code}
> There are a couple extra rows in the redirect output explained by the log
> messages, but not 100. The final line in grep_-o.out is truncated in the
> middle of the row column.
> If I include some terms in the grep to limit the output, I often get
> zero-length files via -o despite seeing results when run interactively.
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