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Posted to reviews@spark.apache.org by yhuai <gi...@git.apache.org> on 2015/10/19 23:43:58 UTC
[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
GitHub user yhuai opened a pull request:
https://github.com/apache/spark/pull/9170
[SPARK-11194] [SQL] Use MutableURLClassLoader for the classLoader in IsolatedClientLoader.
https://issues.apache.org/jira/browse/SPARK-11194
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yhuai/spark SPARK-11194
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9170.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #9170
----
commit a5d3e0a7b28c4fd92a1901795eca48ad8b22ba95
Author: Yin Huai <yh...@databricks.com>
Date: 2015-10-19T21:42:49Z
Use MutableURLClassLoader for the classLoader in IsolatedClientLoader.
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149371574
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149381598
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149379290
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
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https://github.com/apache/spark/pull/9170#issuecomment-149371575
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/9170
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149356854
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by yhuai <gi...@git.apache.org>.
Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149378891
test this please
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149371464
**[Test build #43938 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/43938/consoleFull)** for PR 9170 at commit [`a5d3e0a`](https://github.com/apache/spark/commit/a5d3e0a7b28c4fd92a1901795eca48ad8b22ba95).
* This patch **fails Spark unit tests**.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149379273
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150487940
**[Test build #44208 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44208/consoleFull)** for PR 9170 at commit [`65f0a4c`](https://github.com/apache/spark/commit/65f0a4c9d1e80a74b5c214ed98ec9a68bd9d6530).
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150504857
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by yhuai <gi...@git.apache.org>.
Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149678519
https://docs.oracle.com/javase/8/docs/technotes/guides/net/ClassLoader.html is an article about closing a classloader. Looks like `close` is mainly used when we want to hot-reload a jar.
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by yhuai <gi...@git.apache.org>.
Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/9170#discussion_r42543260
--- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala ---
@@ -148,39 +148,46 @@ private[hive] class IsolatedClientLoader(
protected def classToPath(name: String): String =
name.replaceAll("\\.", "/") + ".class"
- /** The classloader that is used to load an isolated version of Hive. */
- private[hive] var classLoader: ClassLoader = if (isolationOn) {
- new URLClassLoader(allJars, rootClassLoader) {
- override def loadClass(name: String, resolve: Boolean): Class[_] = {
- val loaded = findLoadedClass(name)
- if (loaded == null) doLoadClass(name, resolve) else loaded
- }
- def doLoadClass(name: String, resolve: Boolean): Class[_] = {
- val classFileName = name.replaceAll("\\.", "/") + ".class"
- if (isBarrierClass(name)) {
- // For barrier classes, we construct a new copy of the class.
- val bytes = IOUtils.toByteArray(baseClassLoader.getResourceAsStream(classFileName))
- logDebug(s"custom defining: $name - ${util.Arrays.hashCode(bytes)}")
- defineClass(name, bytes, 0, bytes.length)
- } else if (!isSharedClass(name)) {
- logDebug(s"hive class: $name - ${getResource(classToPath(name))}")
- super.loadClass(name, resolve)
- } else {
- // For shared classes, we delegate to baseClassLoader.
- logDebug(s"shared class: $name")
- baseClassLoader.loadClass(name)
+ /**
+ * The classloader that is used to load an isolated version of Hive.
+ * This classloader is a special URLClassLoader that exposes the addURL method.
+ * So, when we add jar, we can add this new jar directly through the addURL method
+ * instead of stacking a new URLClassLoader on top of it.
+ */
+ private[hive] val classLoader: MutableURLClassLoader = {
+ val isolatedClassLoader =
+ if (isolationOn) {
+ new URLClassLoader(allJars, rootClassLoader) {
+ override def loadClass(name: String, resolve: Boolean): Class[_] = {
+ val loaded = findLoadedClass(name)
+ if (loaded == null) doLoadClass(name, resolve) else loaded
+ }
+ def doLoadClass(name: String, resolve: Boolean): Class[_] = {
+ val classFileName = name.replaceAll("\\.", "/") + ".class"
+ if (isBarrierClass(name)) {
+ // For barrier classes, we construct a new copy of the class.
+ val bytes = IOUtils.toByteArray(baseClassLoader.getResourceAsStream(classFileName))
+ logDebug(s"custom defining: $name - ${util.Arrays.hashCode(bytes)}")
+ defineClass(name, bytes, 0, bytes.length)
+ } else if (!isSharedClass(name)) {
+ logDebug(s"hive class: $name - ${getResource(classToPath(name))}")
+ super.loadClass(name, resolve)
+ } else {
+ // For shared classes, we delegate to baseClassLoader.
+ logDebug(s"shared class: $name")
+ baseClassLoader.loadClass(name)
+ }
+ }
}
+ } else {
+ baseClassLoader
}
- }
- } else {
- baseClassLoader
+ new MutableURLClassLoader(Array.empty, isolatedClassLoader)
--- End diff --
One hacky way to workaround the problem is that we have a no-op `close` method for this classloader.
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150487578
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by yhuai <gi...@git.apache.org>.
Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150725904
Thanks for reviewing! I am merging it to master.
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150487591
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by davies <gi...@git.apache.org>.
Github user davies commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150703883
LGTM
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149381599
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150504855
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149356882
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149360136
**[Test build #43938 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/43938/consoleFull)** for PR 9170 at commit [`a5d3e0a`](https://github.com/apache/spark/commit/a5d3e0a7b28c4fd92a1901795eca48ad8b22ba95).
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by yhuai <gi...@git.apache.org>.
Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-149433030
hmm. When we close a session in thrift server, we will close the session state, which internally closes the class loader (the code starts from https://github.com/apache/spark/blob/master/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala#L77 and `SessionState.close` will call `JavaUtils.closeClassLoadersTo(conf.getClassLoader(), parentLoader)`). So, the mutable classloader will be closed after we close a jdbc session. Actually, this behavior may cause problems even if we do not use this mutable classloader.
@liancheng For our thrift server, do we need to use `HiveSession`?
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[GitHub] spark pull request: [SPARK-11194] [SQL] Use MutableURLClassLoader ...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/9170#issuecomment-150504667
**[Test build #44208 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44208/consoleFull)** for PR 9170 at commit [`65f0a4c`](https://github.com/apache/spark/commit/65f0a4c9d1e80a74b5c214ed98ec9a68bd9d6530).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:\n * `case class LongEncoder(fieldName: String = \"value\", ordinal: Int = 0) extends Encoder[Long] `\n * `case class IntEncoder(fieldName: String = \"value\", ordinal: Int = 0) extends Encoder[Int] `\n * `case class StringEncoder(`\n * ` |class Tuple$`\n * `class Tuple2Encoder[T1, T2](e1: Encoder[T1], e2: Encoder[T2]) extends Encoder[(T1, T2)] `\n * `class Tuple3Encoder[T1, T2, T3](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3]) extends Encoder[(T1, T2, T3)] `\n * `class Tuple4Encoder[T1, T2, T3, T4](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3], e4: Encoder[T4]) extends Encoder[(T1, T2, T3, T4)] `\n * `class Tuple5Encoder[T1, T2, T3, T4, T5](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3], e4: Encoder[T4], e5: Encoder[T5]) extends Encoder[(T1, T2, T3, T4, T5)] `\n * ` implicit class AttributeSeq(attrs: Seq[Attribute]) `\n * `case class MapPartitions[T, U](`\n * `case class AppendColum
n[T, U](`\n * `case class MapGroups[K, T, U](`\n * `class TypedColumn[T](expr: Expression)(implicit val encoder: Encoder[T]) extends Column(expr)`\n * `abstract class SQLImplicits `\n * `case class MapPartitions[T, U](`\n * `case class AppendColumns[T, U](`\n * `case class MapGroups[K, T, U](`\n * ` // to its own URLs over the parent class loader (see Executor's createClassLoader method).`\n
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