[minor] [sql] Partial revert of e683182c3e.

[vanzin]

Moving this file to a different module breaks the maven build; because it
exposes a Guava type in an API used from a different module, unit tests
that end up calling into this code will fail because Guava is shaded in
the maven build.

[vanzin]

/cc @rxin

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Merged build triggered.

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Test build #33016 has started for PR 6243 at commit c1658cb.

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Test build #33016 has finished for PR 6243 at commit c1658cb.

• This patch fails to build.
• This patch merges cleanly.
• This patch adds no public classes.

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Merged build finished. Test FAILed.

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[JoshRosen]

/cc @yhuai as well.

[vanzin]

Jenkins, retest this please.

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Merged build triggered.

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Merged build started.

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Test build #33018 has started for PR 6243 at commit c1658cb.

[andrewor14]

@vanzin@JoshRosen I was looking at the master maven builds and it appears that they have been passing for a few days (until today, but that's caused by a separate build break #6244):

https://amplab.cs.berkeley.edu/jenkins/job/Spark-Master-Maven-pre-YARN/
https://amplab.cs.berkeley.edu/jenkins/job/Spark-Master-Maven-with-YARN/

even though e683182 was merged 5 days ago. Could you point me to specific instance where this causes a build break / test failure?

[vanzin]

Do those builds run unit tests?

The issue is when you run the spark-sql unit tests; unit tests are run against the unshaded classes, so SQLContext still references JavaTypeInference.inferDataType(com.google.common.reflect.TypeToken). But the JavaTypeInference class in the classpath now would come from the catalyst jar, which would have been shaded, and would have a different signature (JavaTypeInference.inferDataType(org.spark-project.guava.reflect.TypeToken)). And the test would fail with a "NoSuchMethodError" or something.

[vanzin]

Actually, after writing that, it's a little weird that it compiles at all; but I did run into the unit test issue. Let me clean up my local env and try again. (With that whole change reverted, things work fine locally.)

[JoshRosen]

@andrewor14, maybe this is caused by that issue where the master Maven build didn't run SQL tests on every commit? We should prioritize merging #5955 to fix this.

[vanzin]

@JoshRosen that PR seems to be for sbt only? (IIRC the dev/ scripts use sbt.)

[andrewor14]

According to @yhuai#5955 is for both SBT and maven. So my guess is that if we merge in #5955 right now we will start seeing test failures that will be fixed by this patch. Is that correct @vanzin?

[vanzin]

Here's what I ran into:

• Running "mvn install -DskipTests" for everything works. Why this works is a little of a mystery to me (since spark-sql should be building against the shaded spark-catalyst artifact and thus fail), but...

• If you run spark-sql unit tests, they fail:

  Running test.org.apache.spark.sql.JavaDataFrameSuite
  Tests run: 7, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.621 sec <<< FAILURE! - in test.org.apache.spark.sql.JavaDataFrameSuite
  testCreateDataFrameFromJavaBeans(test.org.apache.spark.sql.JavaDataFrameSuite) Time elapsed: 0.028 sec <<< ERROR!
  java.lang.NoSuchMethodError: org.apache.spark.sql.catalyst.JavaTypeInference$.inferDataType(Lcom/google/common/reflect/TypeToken;)Lscala/Tuple2;
  at org.apache.spark.sql.SQLContext.getSchema(SQLContext.scala:982)
  at org.apache.spark.sql.SQLContext.createDataFrame(SQLContext.scala:501)
  at org.apache.spark.sql.SQLContext.createDataFrame(SQLContext.scala:530)
  at test.org.apache.spark.sql.JavaDataFrameSuite.testCreateDataFrameFromJavaBeans(JavaDataFrameSuite.java:147)

[vanzin]

@andrewor14 if maven builds are currently not running spark-sql tests, then yes, pushing that PR will cause builds to fail, and this one should fix that.

[yhuai]

@vanzin I checked https://amplab.cs.berkeley.edu/jenkins/job/Spark-Master-Maven-pre-YARN/2393/hadoop.version=2.0.0-mr1-cdh4.1.2,label=centos/consoleFull. I found

Running test.org.apache.spark.sql.JavaDataFrameSuite
Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.789 sec - in test.org.apache.spark.sql.JavaDataFrameSuite

Any idea on the reason that this test passed in jenkins?

[SparkQA]

Test build #33018 has finished for PR 6243 at commit c1658cb.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

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Merged build finished. Test FAILed.

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Test FAILed.
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Test FAILed.

[vanzin]

@yhuai that's interesting. I don't have a good explanation. I'm trying to reproduce that locally to see if I missed something. The only difference I can see is that jenkins is running mvn package while I'm running mvn install.

[vanzin]

So, the only explanation I have is: mvn package does not deploy things to the local repository. But the subsequent mvn test picks up things from the local reposistory. So you're running the tests against a different set of artifacts than the ones that were built.

I checked by running mvn test -X and the classpaths all point to files in ~/.m2/repository. No references to the classes directory under the target dir, except for the particular module being currently built (spark-sql in my case).

That would actually imply that the maven builds are technically broken. Tests are being run against some random artifact that is under the jenkins account's home dir, not against what was just built. IMO the correct way to do things would be to have a per-build local repository and use mvn install instead of mvn package; I'm not sure how you'd do that (I think in our internal builds we use chroot for that).

[vanzin]

(Update: I checked ~/.m2/repository on the jenkins machine and it doesn't contain any 1.4.0-SNAPSHOT artifacts, so that kinda puts a damper on my theory. I'm still trying to figure out why the compilation succeeds while the tests fail - that still doesn't make sense to me. It's probably some obscure maven thing that I'm not familiar with.)

[vanzin]

For those curious, the compilation thing seems to be something super weird with scalac. This code compiles fine:

package org.apache.spark.sql
import org.apache.spark.sql.catalyst.JavaTypeInference
import com.google.common.reflect.TypeToken
object foo{
def main(args: Array[String]): Unit = {
JavaTypeInference.inferDataType(TypeToken.of(classOf[Integer]))
}
}

While the following java code:

import org.apache.spark.sql.catalyst.JavaTypeInference$;
import com.google.common.reflect.TypeToken;
class foo {
public static void main(String[] args) {
JavaTypeInference$.inferDataType(TypeToken.of(foo.class));
}
}

Fails with the expected error:

test.java:7: inferDataType(org.spark-project.guava.reflect.TypeToken<?>) in org.apache.spark.sql.catalyst.JavaTypeInference$ cannot be applied to (com.google.common.reflect.TypeToken<foo>)
JavaTypeInference$.inferDataType(TypeToken.of(foo.class));

Perhaps it has something to do with the fact that we're using a technically illegal package name for the shaded classes (org.spark-project).

[andrewor14]

I see. Unfortunately I am not familiar enough with scalac or SQL to comment on this in any substantial way. @marmbrus@rxin any ideas?

[marmbrus]

test this please

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Merged build triggered.

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Test build #33115 has started for PR 6243 at commit c1658cb.

[SparkQA]

Test build #33115 has finished for PR 6243 at commit c1658cb.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

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Merged build finished. Test PASSed.

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Test PASSed.
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Test PASSed.

[marmbrus]

Are we sure that it was changing the package that broke this? Is it possible that the maven shading plugin is not playing nicely with the scala compiler?

Either way, I'm okay with this change if it solves the problem.

[vanzin]

Are we sure that it was changing the package that broke this?

Not changing of the package, but changing of the module where the file resides. That's what causes shading to get between SQLContext tests and their use of JavaTypeInference.

[marmbrus]

Ah, thanks for explaining. I'm still okay with this if we don't have any other ideas about how to fix it.

[vanzin]

So, can we push this? Or does anyone have a better idea of how to fix it?

[srowen]

I'm going to commit this soon if there are no further comments.

[rxin]

I'm still confused. Is our Jenkins maven build broken? If not, what builds are broken?

Is this related to the "catalyst" module, or the package name? If it is about package name, I think it is better to put this in core's catalyst module.

[vanzin]

Any build that does "mvn install" followed by "mvn test" is broken. Try for yourself.

As I explained above, the problem is the file living in a different module - as in a different project in the tree. It has nothing to do with the package name. See how the file is being moved - I just placed it where it lived before, which was under a different package.

[rxin]

Thanks - does this mean shading for "catalyst" module is broken?

[rxin]

BTW if we want to merge this, let's create a catalyst package in core for now and move that there.

[rxin]

(And don't we need to update Jenkins to make sure it is running the appropriate tests?)

[vanzin]

Thanks - does this mean shading for "catalyst" module is broken?

No, it just means that you cannot expose inter-module APIs that expose shaded classes without breaking things. As for the package, it sounds weird to create a catalyst package inside sql/core, since there's none at the moment. Which is why I chose to just do a plain revert of that part of the original patch.

Regarding the maven build, I don't know. Everything I tried locally did not work, so if something works in jenkins here, it sure to me sounds like something might be broken in its setup.

[rxin]

Thanks for the explanation. Then this pull request should fix the problem right? #6431

[vanzin]

Yes, that should achieve the same thing. I'll close this one then.