Apache Druid

Please try changing the below values in  compaction  task configs if you are getting OutOfMemoryError
```maxBytesInMemory=-1 
maxRowsInMemory= Reduce the value than default 1000000```
If we set maxBytesInMemory to -1, meaning Druid will rely entirely on maxRowsInMemory to control memory usage. Setting it to zero means the default value will be used (one-sixth of the JVM heap size).

^ is running out of direct memory though, those settings control heap for the most part

i guess you’re using `offHeapMemory` for segmentWriteOutMediumFactory, could always try `tmpFile` though it will be slower

`tmpFile` did solve this problem. Thanks!