Github user v-gerasimov commented on the pull request:
https://github.com/apache/spark/pull/8056#issuecomment-146465118
Hi, @rxin!
It seems like something wrong when you try to add ```SQLTab``` to
```SparkUI.tabs```, doesn't
it?(https://github.com/apache/spark/blob/40ed2af587cedadc6e5249031857a922b3b234ca/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLTab.scala)

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