uschindler edited a comment on issue #1172: SOLR-14189 switch from String.trim() to StringUtils.isBlank() URL: https://github.com/apache/lucene-solr/pull/1172#issuecomment-578404626 IsBlank() is behaving fine. If you look at its source code all is checked: - null means blank - empty means blank - all remaining characters are tested on isWhitespace(), if one non-ws found it bails out with false. So common case is fast. So this is the best replacement. We should also look for similar patterns at other places in Solr. +1
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