Github user satishd commented on a diff in the pull request:
https://github.com/apache/storm/pull/1507#discussion_r69766341
--- Diff: storm-core/src/jvm/org/apache/storm/Config.java ---
@@ -1835,6 +1835,21 @@
public static final String TOPOLOGY_CLASSPATH="topology.classpath";
/**
+ * Topology-specific classpath for the worker child process. This will
be *prepended* to
+ * the usual classpath, meaning it can override the Storm classpath.
This is for debugging
+ * purposes, and is disabled by default. To allow topologies to be
submitted with user-first
+ * classpaths, set the user.classpath.first.enabled config to true.
+ */
+ @isStringOrStringList
+ public static final String
TOPOLOGY_CLASSPATH_FIRST="topology.classpath.first";
+
+ /**
+ * Enables user-first classpath. See topology.classpath.first
+ */
+ @isBoolean
+ public static final String
STORM_USER_CLASSPATH_FIRST_ENABLED="storm.user.classpath.first.enabled";
--- End diff --
This can be `topology.classpath.first` or `pre.topology.classpath` with
appending enabled which can be `topology.classpath.first.enabled` or
`pre.topology.classpath.enabled`
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