loquisgon commented on a change in pull request #11294:
URL: https://github.com/apache/druid/pull/11294#discussion_r664967315
##########
File path:
server/src/main/java/org/apache/druid/segment/realtime/appenderator/StreamAppenderator.java
##########
@@ -166,7 +166,16 @@
private volatile Throwable persistError;
+
+ /**
+ * Flag to tell internals whether appenderator is working on behalf of a
real time task.
+ * This is to manage certain aspects as needed. For example, for batch,
non-real time tasks,
+ * physical segments (i.e. hydrants) do not need to memory map their
persisted
+ * files. In this case, the code will avoid memory mapping them thus
ameliorating the occurance
+ * of OOMs.
+ */
private final boolean isRealTime;
Review comment:
It is used for the fall back flag.
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