Github user paul-rogers commented on a diff in the pull request:
https://github.com/apache/drill/pull/672#discussion_r90689224
--- Diff: exec/java-exec/src/main/resources/drill-module.conf ---
@@ -45,11 +45,13 @@ drill.client: {
supports-complex-types: true
}
-// Directory is used as base for temporary storage of Dynamic UDF jars.
-// Set this property if you want to have custom temporary directory,
instead of generated at runtime.
-// By default ${DRILL_TMP_DIR} is used if set.
-// drill.tmp-dir: "/tmp"
-// drill.tmp-dir: ${?DRILL_TMP_DIR}
+// Location Drill uses for temporary files, such as downloaded dynamic
UDFs jars.
--- End diff --
Can we leave it that, if blank, it will use the system-generated directory
as you have in 1.9? This means we'll still need your getTmpDir method. To do
the check for blank.
Also, as it turns out, we already have a temp dir setting used elsewhere.
Look in drill-override-example.conf under drill.sys.store.provider.local.path.
It uses "/tmp/drill". Then it adds subdirs for storage plugins and what-not.
Can we use "/tmp/drill/udf" as the base temp storage location for udfs to
be consistent? Then we'd add the cluster-id, etc. as in your "cluster-temp-dir"
below.
And, yes, we have lots of places where we specify the temp file system
(UDFs, the one cited above, the (unused) cache.hazel, the temp dirs for
spilling, ...). We do need to create a project (later) to rationalize all of
this...
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