Github user adeneche commented on a diff in the pull request: https://github.com/apache/drill/pull/159#discussion_r39798636 --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/server/options/SessionOptionManager.java --- @@ -46,6 +47,33 @@ public SessionOptionManager(final OptionManager systemOptions, final UserSession } @Override + public void deleteOption(final String name, final OptionValue.OptionType type) { + if (type == OptionValue.OptionType.SESSION) { + try { // ensure option exists --- End diff -- You only ensure the option exists when `type == SESSION`. How about _SYSTEM_, is it done by the underlying _fallback_ OptionManager ?
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