GitHub user srowen opened a pull request:
https://github.com/apache/incubator-spark/pull/586
SPARK-1084. Fix most build warnings
https://spark-project.atlassian.net/browse/SPARK-1084
I hope another boring tidy-up JIRA might be welcome. I'd like to fix most
of the warnings that appear during build, so that developers don't become
accustomed to them. The accompanying pull request contains a number of commits
to quash most warnings observed through the `mvn` and `sbt` builds, although
not all of them.
### FIXED!
`[WARNING] Parameter tasks is deprecated, use target instead`
Just a matter of updating <tasks> -> <target> in inline Ant scripts.
`WARNING: -p has been deprecated and will be reused for a different (but
still very cool) purpose in ScalaTest 2.0. Please change all uses of -p to -R.`
Goes away with updating scalatest plugin -> 1.0-RC2
```
[WARNING] Note:
/Users/srowen/Documents/incubator-spark/core/src/test/scala/org/apache/spark/JavaAPISuite.java
uses unchecked or unsafe operations.
[WARNING] Note: Recompile with -Xlint:unchecked for details.
```
Mostly `@SuppressWarnings("unchecked")` but needed a few more things to
reveal the warning source: <fork>true</fork> (also needd for <maxmem>) and
version 3.1 of the plugin. In a few cases some declaration changes were
appropriate to avoid warnings.
```
/Users/srowen/Documents/incubator-spark/core/src/main/scala/org/apache/spark/util/IndestructibleActorSystem.scala:25:
warning: Could not find any member to link for "akka.actor.ActorSystem".
/**
^
```
Getting several scaladoc errors like this and I'm not clear why it can't
find the type -- outside its module? Remove the links as they're evidently not
linking anyway?
```
/Users/srowen/Documents/incubator-spark/repl/src/main/scala/org/apache/spark/repl/SparkIMain.scala:86:
warning: Variable eval undefined in comment for class SparkIMain in class
SparkIMain
```
$ has to be escaped as \$ in scaladoc, apparently
```
[WARNING]
'dependencyManagement.dependencies.dependency.exclusions.exclusion.artifactId'
for org.apache.hadoop:hadoop-yarn-client:jar with value '*' does not match a
valid id pattern. @ org.apache.spark:spark-parent:1.0.0-incubating-SNAPSHOT,
/Users/srowen/Documents/incubator-spark/pom.xml, line 494, column 25
```
This one might need review.
This is valid Maven syntax, but, Maven still warns on it. I wanted to see
if we can do without it.
These are trying to exclude:
- `org.codehaus.jackson`
- `org.sonatype.sisu.inject`
- `org.xerial.snappy`
`org.sonatype.sisu.inject` doesn't actually seem to be a dependency anyway.
`org.xerial.snappy` is used by dependencies but the version seems to match
anyway (1.0.5).
`org.codehaus.jackson` was intended to exclude 1.8.8, since Spark streaming
wants 1.9.11 directly. But the exclusion is in the wrong place if so, since
Spark depends straight on Avro, which is what brings in 1.8.8, still.
(hadoop-client 1.0.4 includes Jackson 1.0.1, so that needs an exclusion, but
the other Hadoop modules don't.)
HBase depends on 1.8.8 but figured it was intentional to leave that as it
would not collide with Spark streaming. (?)
(I understand this varies by Hadoop version but confirmed this is all the
same for 1.0.4, 0.23.7, 2.2.0.)
### NOT FIXED
```
[warn]
/Users/srowen/Documents/incubator-spark/streaming/src/test/scala/org/apache/spark/streaming/InputStreamsSuite.scala:305:
method connect in class IOManager is deprecated: use the new implementation in
package akka.io instead
[warn] override def preStart = IOManager(context.system).connect(new
InetSocketAddress(port))
```
Not confident enough to fix this.
`[WARNING] there were 6 feature warning(s); re-run with -feature for
details`
Don't know enough Scala to address these, yet.
`[WARNING] We have a duplicate
org/yaml/snakeyaml/scanner/ScannerImpl$Chomping.class in
/Users/srowen/.m2/repository/org/yaml/snakeyaml/1.6/snakeyaml-1.6.jar`
Probably addressable by being more careful about how binaries are packed
though this appear to be ignorable; two identical copies of the class are
colliding.
`[WARNING] Zinc server is not available at port 3030 - reverting to normal
incremental compile`
and
`[WARNING] JAR will be empty - no content was marked for inclusion!`
Apparently harmless warnings, but I don't know how to disable them.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/incubator-spark FixWarnings
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-spark/pull/586.patch
----
commit 7f6879c601c929c884b4e1fcaf155b1740dc8881
Author: Sean Owen <so...@cloudera.com>
Date: 2014-02-11T14:37:03Z
Replace deprecated Ant <tasks> with <target>
commit c4f37ebd4c28fd46f1d4fff2613cfea8ac9fb2aa
Author: Sean Owen <so...@cloudera.com>
Date: 2014-02-11T14:37:58Z
Fix unescaped $, bad tag in scaladoc
commit c5befe1c47923a43fc11d8c7fa10f223eec4257c
Author: Sean Owen <so...@cloudera.com>
Date: 2014-02-11T14:38:23Z
Remove dead scaladoc links
commit c88a983ea686de4381f1f367a9f49faedaf7fcc1
Author: Sean Owen <so...@cloudera.com>
Date: 2014-02-11T14:38:57Z
Suppress and/or fix unchecked javac warnings
commit 5d86e49b7c8d6473ecb90248c022d2b59791254b
Author: Sean Owen <so...@cloudera.com>
Date: 2014-02-11T14:39:48Z
Fix scaladoc invocation warning, and enable javac warnings properly, with
plugin config updates
commit 4093ed0e947c83f258106a07e0377e70c03535d8
Author: Sean Owen <so...@cloudera.com>
Date: 2014-02-11T18:55:57Z
Fix (?) Jackson exclusion, and remove apparently unneeded exclusions, all
of which were causing build warnings
----
