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https://issues.apache.org/jira/browse/SOLR-15009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17240960#comment-17240960
]
ASF subversion and git services commented on SOLR-15009:
--------------------------------------------------------
Commit 388d66573881175cf38a4f879e3b73fe25699086 in lucene-solr's branch
refs/heads/branch_8x from Mike Drob
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=388d665 ]
SOLR-15009 Propogate IOException from DF.exists
> DirectoryFactory exists masks IOExceptions
> ------------------------------------------
>
> Key: SOLR-15009
> URL: https://issues.apache.org/jira/browse/SOLR-15009
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 8.4.1
> Reporter: Mike Drob
> Priority: Major
> Labels: NPE
> Time Spent: 40m
> Remaining Estimate: 0h
>
> This NPE was seen on a cluster running 8.4.1 -
> {noformat}
> o.a.s.h.RequestHandlerBase java.lang.NullPointerException
> at
> org.apache.solr.core.StandardDirectoryFactory.exists(StandardDirectoryFactory.java:92)
> at org.apache.solr.core.SolrCore.getIndexSize(SolrCore.java:462)
> at
> org.apache.solr.core.SolrCore.lambda$initializeMetrics$8(SolrCore.java:1200)
> at
> org.apache.solr.metrics.SolrMetricManager$GaugeWrapper.getValue(SolrMetricManager.java:711)
> at
> org.apache.solr.util.stats.MetricUtils.convertGauge(MetricUtils.java:488)
> at
> org.apache.solr.util.stats.MetricUtils.convertMetric(MetricUtils.java:274)
> at
> org.apache.solr.util.stats.MetricUtils.lambda$toMaps$4(MetricUtils.java:213)
> {noformat}
> The problem comes from an IOException from list, which gets turned into a
> null return. In this case, we do want the IOException to bubble so that we
> can catch and log in getIndexSize.
> Aside from that, if all we really care about is whether there are files, then
> we could do a much more efficient check than requiring the whole directory to
> be listed. This is especially problematic when the directory is large or
> remote.
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