keith-turner opened a new issue #1418: Remove DefaultMap and use computeIfAbsent instead. URL: https://github.com/apache/accumulo/issues/1418 I think [DefaultMap](https://github.com/apache/accumulo/blob/bbee47b8b95d230ba9def235917013dcfeaf7c38/server/base/src/main/java/org/apache/accumulo/server/util/DefaultMap.java) could be removed from the code. There are currently two places in the code that create a DefaultMap. I think these could instead create a HashMap and when `get()` is called on that hasmap use computeIfAbsent creating whatever DefaultMap would have created. Its only used in two places. For the usage in `Master.getMasterMonitorInfo()` I think only the `get()` in that method needs to be replaced, nowhere else. For the usage at `Master.badServers` I think only usage in `Master.gatherTableInformation()` needs to be updated.
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