Author: GuoQiang Li <witgo@qq.com>
Closes#3788 from witgo/SPARK-4952 and squashes the following commits:
d903529 [GuoQiang Li] Handle ConcurrentModificationExceptions in SparkEnv.environmentDetails
The master and worker spark version may be not the same with Driver spark version. That is because spark Jar file might be replaced for new application without restarting the spark cluster. So there shall log out the spark-version in both Mater and Worker log.
Author: Zhang, Liye <liye.zhang@intel.com>
Closes#3790 from liyezhang556520/version4Standalone and squashes the following commits:
e05e1e3 [Zhang, Liye] add spark version infomation in log for standalone mode
...ore-asl
- set the same version to jackson-mapper-asl and jackson-core-asl
- It's related with #2818
- coded a same patch from a latest master
Author: Jongyoul Lee <jongyoul@gmail.com>
Closes#3716 from jongyoul/SPARK-3955 and squashes the following commits:
efa29aa [Jongyoul Lee] [SPARK-3955] Different versions between jackson-mapper-asl and jackson-core-asl - set the same version to jackson-mapper-asl and jackson-core-asl
This PR is another solution for When we build with sbt with profile for hadoop and without property for hadoop version like:
sbt/sbt -Phadoop-2.2 assembly
jar name is always used default version (1.0.4).
When we build with maven with same condition for sbt, default version for each profile is used.
For instance, if we build like:
mvn -Phadoop-2.2 package
jar name is used hadoop2.2.0 as a default version of hadoop-2.2.
Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>
Closes#3046 from sarutak/fix-assembly-jarname-2 and squashes the following commits:
41ef90e [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into fix-assembly-jarname-2
50c8676 [Kousuke Saruta] Merge branch 'fix-assembly-jarname-2' of github.com:sarutak/spark into fix-assembly-jarname-2
52a1cd2 [Kousuke Saruta] Fixed comflicts
dd30768 [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into fix-assembly-jarname2
f1c90bb [Kousuke Saruta] Fixed SparkBuild.scala in order to read `hadoop.version` property from pom.xml
af6b100 [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into fix-assembly-jarname
c81806b [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into fix-assembly-jarname
ad1f96e [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into fix-assembly-jarname
b2318eb [Kousuke Saruta] Merge branch 'master' of git://git.apache.org/spark into fix-assembly-jarname
5fc1259 [Kousuke Saruta] Fixed typo.
eebbb7d [Kousuke Saruta] Fixed wrong jar name
This commit exists to close the following pull requests on Github:
Closes#3456 (close requested by 'pwendell')
Closes#1602 (close requested by 'tdas')
Closes#2633 (close requested by 'tdas')
Closes#2059 (close requested by 'JoshRosen')
Closes#2348 (close requested by 'tdas')
Closes#3662 (close requested by 'tdas')
Closes#2031 (close requested by 'andrewor14')
Closes#265 (close requested by 'JoshRosen')
Author: CodingCat <zhunansjtu@gmail.com>
Closes#3807 from CodingCat/new_branch and squashes the following commits:
5167f01 [CodingCat] fix typo in the comment
There is only one implicit function `toPairDStreamFunctions` in `StreamingContext`. This PR did similar reorganization like [SPARK-4397](https://issues.apache.org/jira/browse/SPARK-4397).
Compiled the following codes with Spark Streaming 1.1.0 and ran it with this PR. Everything is fine.
```Scala
import org.apache.spark._
import org.apache.spark.streaming._
import org.apache.spark.streaming.StreamingContext._
object StreamingApp {
def main(args: Array[String]) {
val conf = new SparkConf().setMaster("local[2]").setAppName("FileWordCount")
val ssc = new StreamingContext(conf, Seconds(10))
val lines = ssc.textFileStream("/some/path")
val words = lines.flatMap(_.split(" "))
val pairs = words.map(word => (word, 1))
val wordCounts = pairs.reduceByKey(_ + _)
wordCounts.print()
ssc.start()
ssc.awaitTermination()
}
}
```
Author: zsxwing <zsxwing@gmail.com>
Closes#3464 from zsxwing/SPARK-4608 and squashes the following commits:
aa6d44a [zsxwing] Fix a copy-paste error
f74c190 [zsxwing] Merge branch 'master' into SPARK-4608
e6f9cc9 [zsxwing] Update the docs
27833bb [zsxwing] Remove `import StreamingContext._`
c15162c [zsxwing] Reorganize StreamingContext implicit to improve API convenience
Add `processingDelay`, `schedulingDelay` and `totalDelay` for the last completed batch. Add `lastReceivedBatchRecords` and `totalReceivedBatchRecords` to the received records counting.
Author: jerryshao <saisai.shao@intel.com>
Closes#3466 from jerryshao/SPARK-4537 and squashes the following commits:
00f5f7f [jerryshao] Change the code style and add totalProcessedRecords
44721a6 [jerryshao] Further address the comments
c097ddc [jerryshao] Address the comments
02dd44f [jerryshao] Fix the addressed comments
c7a9376 [jerryshao] Expand StreamingSource to add more metrics
Going forward, we'll use matching branch names across the mesos/spark-ec2 and apache/spark repositories, per [the discussion here](https://github.com/mesos/spark-ec2/pull/85#issuecomment-68069589).
Author: Nicholas Chammas <nicholas.chammas@gmail.com>
Closes#3804 from nchammas/patch-2 and squashes the following commits:
cd2c0d4 [Nicholas Chammas] [EC2] Update mesos/spark-ec2 branch to branch-1.3
Now that 1.2.0 is out, let's update the default Spark version.
Author: Nicholas Chammas <nicholas.chammas@gmail.com>
Closes#3793 from nchammas/patch-1 and squashes the following commits:
3255832 [Nicholas Chammas] add 1.2.0 version to Spark-Shark map
ec0e904 [Nicholas Chammas] [EC2] Update default Spark version to 1.2.0
At the section "Specifying the Hadoop Version" In building-spark.md, there is description about building with YARN with Hadoop 0.23.
Spark 1.3.0 will not support Hadoop 0.23 so we should fix the description.
Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>
Closes#3787 from sarutak/SPARK-4953 and squashes the following commits:
ee9c355 [Kousuke Saruta] Removed description related to a specific vendor
9ab0c24 [Kousuke Saruta] Fix the description about building SPARK with YARN
Use `Future.zip` instead of `Future.flatMap`(for-loop). `zip` implies these two Futures will run concurrently, while `flatMap` usually means one Future depends on the other one.
Author: zsxwing <zsxwing@gmail.com>
Closes#3721 from zsxwing/SPARK-4873 and squashes the following commits:
46a2cd9 [zsxwing] Use Future.zip instead of Future.flatMap(for-loop)
There are a number of warnings generated in a normal, successful build right now. They're mostly Java unchecked cast warnings, which can be suppressed. But there's a grab bag of other Scala language warnings and so on that can all be easily fixed. The forthcoming PR fixes about 90% of the build warnings I see now.
Author: Sean Owen <sowen@cloudera.com>
Closes#3157 from srowen/SPARK-4297 and squashes the following commits:
8c9e469 [Sean Owen] Suppress unchecked cast warnings, and several other build warning fixes
It's really a minor issue.
In ApplicationMaster, there is code like as follows.
val preserveFiles = sparkConf.get("spark.yarn.preserve.staging.files", "false").toBoolean
I think, the code can be simplified like as follows.
val preserveFiles = sparkConf.getBoolean("spark.yarn.preserve.staging.files", false)
Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>
Closes#3733 from sarutak/SPARK-4881 and squashes the following commits:
1771430 [Kousuke Saruta] Modified the code like sparkConf.get(...).toBoolean to sparkConf.getBoolean(...)
c63daa0 [Kousuke Saruta] Simplified code
This PR modifies the python `SchemaRDD` to use `sample()` and `takeSample()` from Scala instead of the slower python implementations from `rdd.py`. This is worthwhile because the `Row`'s are already serialized as Java objects.
In order to use the faster `takeSample()`, a `takeSampleToPython()` method was implemented in `SchemaRDD.scala` following the pattern of `collectToPython()`.
Author: jbencook <jbenjamincook@gmail.com>
Author: J. Benjamin Cook <jbenjamincook@gmail.com>
Closes#3764 from jbencook/master and squashes the following commits:
6fbc769 [J. Benjamin Cook] [SPARK-4860][pyspark][sql] fixing sloppy indentation for takeSampleToPython() arguments
5170da2 [J. Benjamin Cook] [SPARK-4860][pyspark][sql] fixing typo: from RDD to SchemaRDD
de22f70 [jbencook] [SPARK-4860][pyspark][sql] using sample() method from JavaSchemaRDD
b916442 [jbencook] [SPARK-4860][pyspark][sql] adding sample() to JavaSchemaRDD
020cbdf [jbencook] [SPARK-4860][pyspark][sql] using Scala implementations of `sample()` and `takeSample()`
Author: Marcelo Vanzin <vanzin@cloudera.com>
Closes#3460 from vanzin/SPARK-4606 and squashes the following commits:
031207d [Marcelo Vanzin] [SPARK-4606] Send EOF to child JVM when there's no more data to read.
Currently streaming block will be replicated when specific storage level is set, since WAL is already fault tolerant, so replication is needless and will hurt the throughput of streaming application.
Hi tdas , as per discussed about this issue, I fixed with this implementation, I'm not is this the way you want, would you mind taking a look at it? Thanks a lot.
Author: jerryshao <saisai.shao@intel.com>
Closes#3534 from jerryshao/SPARK-4671 and squashes the following commits:
500b456 [jerryshao] Do not replicate streaming block when WAL is enabled
Once the streaming receiver is de-registered at executor, the `ReceiverTrackerActor` needs to
remove the corresponding reveiverInfo from the `receiverInfo` map at `ReceiverTracker`.
Author: Ilayaperumal Gopinathan <igopinathan@pivotal.io>
Closes#3647 from ilayaperumalg/receiverInfo-RTracker and squashes the following commits:
6eb97d5 [Ilayaperumal Gopinathan] Polishing based on the review
3640c86 [Ilayaperumal Gopinathan] Remove receiverInfo once receiver is de-registered
SPARK-2261 uses a single file to log events for an app. `eventLogDir` in `ApplicationDescription` is replaced with `eventLogFile`. However, `ApplicationDescription` in `SparkDeploySchedulerBackend` is initialized with `SparkContext`'s `eventLogDir`. It is just the log directory, not the actual log file path. `Master.rebuildSparkUI` can not correctly rebuild a new SparkUI for the app.
Because the `ApplicationDescription` is remotely registered with `Master` and the app's id is then generated in `Master`, we can not get the app id in advance before registration. So the received description needs to be modified with correct `eventLogFile` value.
Author: Liang-Chi Hsieh <viirya@gmail.com>
Closes#3755 from viirya/fix_app_logdir and squashes the following commits:
5e0ea35 [Liang-Chi Hsieh] Revision for comment.
b5730a1 [Liang-Chi Hsieh] Fix incorrect event log path.
Closes#3777 (a duplicate PR for the same JIRA)
See https://issues.apache.org/jira/browse/SPARK-4730.
Author: Andrew Or <andrew@databricks.com>
Closes#3590 from andrewor14/yarn-settings and squashes the following commits:
36e0753 [Andrew Or] Merge branch 'master' of github.com:apache/spark into yarn-settings
dcd1316 [Andrew Or] Warn against deprecated YARN settings
This PR tries to fix the Hive tests failure encountered in PR #3157 by cleaning `lib_managed` before building assembly jar against Hive 0.13.1 in `dev/run-tests`. Otherwise two sets of datanucleus jars would be left in `lib_managed` and may mess up class paths while executing Hive test suites. Please refer to [this thread] [1] for details. A clean build would be even safer, but we only clean `lib_managed` here to save build time.
This PR also takes the chance to clean up some minor typos and formatting issues in the comments.
[1]: https://github.com/apache/spark/pull/3157#issuecomment-67656488
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Author: Cheng Lian <lian@databricks.com>
Closes#3756 from liancheng/clean-lib-managed and squashes the following commits:
e2bd21d [Cheng Lian] Adds lib_managed to clean set
c9f2f3e [Cheng Lian] Cleans lib_managed before compiling with Hive 0.13.1
Trivial modifications for usability.
Author: Takeshi Yamamuro <linguin.m.s@gmail.com>
Closes#3775 from maropu/AddHelpCommentInAnalytics and squashes the following commits:
fbea8f5 [Takeshi Yamamuro] Add help comments in Analytics
Commit 7aacb7bfa added support for sharing downloaded files among multiple
executors of the same app. That works great in Yarn, since the app's directory
is cleaned up after the app is done.
But Spark standalone mode didn't do that, so the lock/cache files created
by that change were left around and could eventually fill up the disk hosting
/tmp.
To solve that, create app-specific directories under the local dirs when
launching executors. Multiple executors launched by the same Worker will
use the same app directories, so they should be able to share the downloaded
files. When the application finishes, a new message is sent to all workers
telling them the application has finished; once that message has been received,
and all executors registered for the application shut down, then those
directories will be cleaned up by the Worker.
Note: Unit testing this is hard (if even possible), since local-cluster mode
doesn't seem to leave the Master/Worker daemons running long enough after
`sc.stop()` is called for the clean up protocol to take effect.
Author: Marcelo Vanzin <vanzin@cloudera.com>
Closes#3705 from vanzin/SPARK-4834 and squashes the following commits:
b430534 [Marcelo Vanzin] Remove seemingly unnecessary synchronization.
50eb4b9 [Marcelo Vanzin] Review feedback.
c0e5ea5 [Marcelo Vanzin] [SPARK-4834] [standalone] Clean up application files after app finishes.
PR #3737 changed `spark-ec2` to automatically download boto from PyPI. This PR tell git to ignore those downloaded library files.
Author: Nicholas Chammas <nicholas.chammas@gmail.com>
Closes#3770 from nchammas/ignore-ec2-lib and squashes the following commits:
5c440d3 [Nicholas Chammas] gitignore downloaded EC2 libs
Author: Nicholas Chammas <nicholas.chammas@gmail.com>
Closes#3772 from nchammas/patch-1 and squashes the following commits:
b7d9083 [Nicholas Chammas] [Docs] Minor typo fixes
In most of the academic paper and algorithm implementations,
people use L = 1/2n ||A weights-y||^2 instead of L = 1/n ||A weights-y||^2
for least-squared loss. See Eq. (1) in http://web.stanford.edu/~hastie/Papers/glmnet.pdf
Since MLlib uses different convention, this will result different residuals and
all the stats properties will be different from GLMNET package in R.
The model coefficients will be still the same under this change.
Author: DB Tsai <dbtsai@alpinenow.com>
Closes#3746 from dbtsai/lir and squashes the following commits:
19c2e85 [DB Tsai] make stepsize twice to converge to the same solution
0b2c29c [DB Tsai] first commit
In Scala, `map` and `flatMap` of `Iterable` will copy the contents of `Iterable` to a new `Seq`. Such as,
```Scala
val iterable = Seq(1, 2, 3).map(v => {
println(v)
v
})
println("Iterable map done")
val iterator = Seq(1, 2, 3).iterator.map(v => {
println(v)
v
})
println("Iterator map done")
```
outputed
```
1
2
3
Iterable map done
Iterator map done
```
So we should use 'iterator' to reduce memory consumed by join.
Found by Johannes Simon in http://mail-archives.apache.org/mod_mbox/spark-user/201412.mbox/%3C5BE70814-9D03-4F61-AE2C-0D63F2DE4446%40mail.de%3E
Author: zsxwing <zsxwing@gmail.com>
Closes#3671 from zsxwing/SPARK-4824 and squashes the following commits:
48ee7b9 [zsxwing] Remove the explicit types
95d59d6 [zsxwing] Add 'iterator' to reduce memory consumed by join
It is not convenient to see the Spark version. We can keep the same style with Spark website.
Author: genmao.ygm <genmao.ygm@alibaba-inc.com>
Closes#3763 from uncleGen/master-clean-141222 and squashes the following commits:
0dcb9a9 [genmao.ygm] [SPARK-4920][UI]:current spark version in UI is not striking.
Minor fix for an obvious scala doc error.
Author: Liang-Chi Hsieh <viirya@gmail.com>
Closes#3751 from viirya/fix_scaladoc and squashes the following commits:
03fddaa [Liang-Chi Hsieh] Fix scala doc.
This commit consolidates some of the exceptions thrown if compression codecs are not available. If a bad configuration string was passed in, a ClassNotFoundException was through. Also, if Snappy was not available, it would throw an InvocationTargetException when the codec was being used (not when it was being initialized). Now, an IllegalArgumentException is thrown when a codec is not available at creation time - either because the class does not exist or the codec itself is not available in the system. This will allow us to have a better message and fail faster.
Author: Kostas Sakellis <kostas@cloudera.com>
Closes#3119 from ksakellis/kostas-spark-4079 and squashes the following commits:
9709c7c [Kostas Sakellis] Removed unnecessary Logging class
63bfdd0 [Kostas Sakellis] Removed isAvailable to preserve binary compatibility
1d0ef2f [Kostas Sakellis] [SPARK-4079] [CORE] Added more information to exception
64f3d27 [Kostas Sakellis] [SPARK-4079] [CORE] Code review feedback
52dfa8f [Kostas Sakellis] [SPARK-4079] [CORE] Default to LZF if Snappy not available
Add missing Javadoc comments in ShuffleDependency.
Author: Takeshi Yamamuro <linguin.m.s@gmail.com>
Closes#3594 from maropu/DependencyJavadocFix and squashes the following commits:
32129b4 [Takeshi Yamamuro] Fix comments in @aggregator and @mapSideCombine
303c75d [Takeshi Yamamuro] [SPARK-4733] Add missing prameter comments in ShuffleDependency
Using
val arr1 = (0 until num).toArray
instead of
val arr1 = new Array[Int](num)
for (i <- 0 until arr1.length) {
arr1(i) = i
}
for short.
Author: carlmartin <carlmartinmax@gmail.com>
Closes#3750 from SaintBacchus/BroadcastTest and squashes the following commits:
43adb70 [carlmartin] Improve some code in BroadcastTest for short
Author: zsxwing <zsxwing@gmail.com>
Closes#3734 from zsxwing/SPARK-4883 and squashes the following commits:
e6f2b61 [zsxwing] Fix the name
cc74727 [zsxwing] Add a name to the directoryCleaner thread
Author: Zhang, Liye <liye.zhang@intel.com>
Closes#3717 from liyezhang556520/version2Log and squashes the following commits:
ccd30d7 [Zhang, Liye] delete log in sparkConf
330f70c [Zhang, Liye] move the log from SaprkConf to SparkContext
96dc115 [Zhang, Liye] remove curly brace
e833330 [Zhang, Liye] add spark version to driver log
Author: Tsuyoshi Ozawa <ozawa.tsuyoshi@lab.ntt.co.jp>
Closes#3757 from oza/SPARK-4915 and squashes the following commits:
3b0d6d6 [Tsuyoshi Ozawa] Fix classname to be specified for external shuffle service.
Reuse Text in saveAsTextFile to reduce GC.
/cc rxin
Author: zsxwing <zsxwing@gmail.com>
Closes#3762 from zsxwing/SPARK-4918 and squashes the following commits:
59f03eb [zsxwing] Reuse Text in saveAsTextFile
`NullWritable` is a `Comparable` rather than `Comparable[NullWritable]` in Hadoop 1.+, so the compiler cannot find an implicit Ordering for it. It will generate different anonymous classes for `saveAsTextFile` in Hadoop 1.+ and Hadoop 2.+. Therefore, here we provide an Ordering for NullWritable so that the compiler will generate same codes.
I used the following commands to confirm the generated byte codes are some.
```
mvn -Dhadoop.version=1.2.1 -DskipTests clean package -pl core -am
javap -private -c -classpath core/target/scala-2.10/classes org.apache.spark.rdd.RDD > ~/hadoop1.txt
mvn -Pyarn -Phadoop-2.2 -Dhadoop.version=2.2.0 -DskipTests clean package -pl core -am
javap -private -c -classpath core/target/scala-2.10/classes org.apache.spark.rdd.RDD > ~/hadoop2.txt
diff ~/hadoop1.txt ~/hadoop2.txt
```
However, the compiler will generate different codes for the classes which call methods of `JobContext/TaskAttemptContext`. `JobContext/TaskAttemptContext` is a class in Hadoop 1.+, and calling its method will use `invokevirtual`, while it's an interface in Hadoop 2.+, and will use `invokeinterface`.
To fix it, we can use reflection to call `JobContext/TaskAttemptContext.getConfiguration`.
Author: zsxwing <zsxwing@gmail.com>
Closes#3740 from zsxwing/SPARK-2075 and squashes the following commits:
39d9df2 [zsxwing] Fix the code style
e4ad8b5 [zsxwing] Use null for the implicit Ordering
734bac9 [zsxwing] Explicitly set the implicit parameters
ca03559 [zsxwing] Use reflection to access JobContext/TaskAttemptContext.getConfiguration
fa40db0 [zsxwing] Add an Ordering for NullWritable to make the compiler generate same byte codes for RDD
Fix small Hadoop 1 compile error from SPARK-2261. In Hadoop 1.x, all we have is FileStatus.isDir, so these "is file" assertions are changed to "is not a dir". This is how similar checks are done so far in the code base.
Author: Sean Owen <sowen@cloudera.com>
Closes#3754 from srowen/SPARK-4910 and squashes the following commits:
52c5e4e [Sean Owen] Fix small Hadoop 1 compile error from SPARK-2261
Mvn Build Failed: value defaultProperties not found .Maybe related to this pr:
1d648123a7
andrewor14 can you look at this problem?
Author: huangzhaowei <carlmartinmax@gmail.com>
Closes#3749 from SaintBacchus/Mvn-Build-Fail and squashes the following commits:
8e2917c [huangzhaowei] Build Failed: value defaultProperties not found
Once the external shuffle service is also documented, the dynamic allocation section will link to it. Let me know if the whole dynamic allocation should be moved to its separate page; I personally think the organization might be cleaner that way.
This patch builds on top of oza's work in #3689.
aarondav pwendell
Author: Andrew Or <andrew@databricks.com>
Author: Tsuyoshi Ozawa <ozawa.tsuyoshi@gmail.com>
Closes#3731 from andrewor14/document-dynamic-allocation and squashes the following commits:
1281447 [Andrew Or] Address a few comments
b9843f2 [Andrew Or] Document the configs as well
246fb44 [Andrew Or] Merge branch 'SPARK-4839' of github.com:oza/spark into document-dynamic-allocation
8c64004 [Andrew Or] Add documentation for dynamic allocation (without configs)
6827b56 [Tsuyoshi Ozawa] Fixing a documentation of spark.dynamicAllocation.enabled.
53cff58 [Tsuyoshi Ozawa] Adding a documentation about dynamic resource allocation.
My guess for fixing https://issues.apache.org/jira/browse/SPARK-4831.
Author: Daniel Darabos <darabos.daniel@gmail.com>
Closes#3678 from darabos/patch-1 and squashes the following commits:
36e1243 [Daniel Darabos] Do not include SPARK_CLASSPATH if empty.
Since we can set spark executor memory and executor cores using property file, we must also be allowed to set the executor instances.
Author: Kanwaljit Singh <kanwaljit.singh@guavus.com>
Closes#1657 from kjsingh/branch-1.0 and squashes the following commits:
d8a5a12 [Kanwaljit Singh] SPARK-2641: Fixing how spark arguments are loaded from properties file for num executors
Conflicts:
core/src/main/scala/org/apache/spark/deploy/SparkSubmitArguments.scala
Added equivalent module as utils.sh and modified spark-shell2.cmd to use it to parse options.
Now we can use application options.
ex) `bin\spark-shell.cmd --master spark://master:7077 -i path\to\script.txt`
Author: Masayoshi TSUZUKI <tsudukim@oss.nttdata.co.jp>
Closes#3350 from tsudukim/feature/SPARK-3060 and squashes the following commits:
4551e56 [Masayoshi TSUZUKI] Modified too long line which defines the submission options to pass findstr command.
3a11361 [Masayoshi TSUZUKI] [SPARK-3060] spark-shell.cmd doesn't accept application options in Windows OS
the signature of registerKryoClasses is actually of Array[Class[_]] not Seq
Author: Eran Medan <ehrann.mehdan@gmail.com>
Closes#3747 from eranation/patch-1 and squashes the following commits:
ee9885d [Eran Medan] change signature of example to match released code
Currently the event logger uses a directory and several files to
describe an app's event log, all but one of which are empty. This
is not very HDFS-friendly, since creating lots of nodes in HDFS
(especially when they don't contain any data) is frowned upon due
to the node metadata being kept in the NameNode's memory.
Instead, add a header section to the event log file that contains metadata
needed to read the events. This metadata includes things like the Spark
version (for future code that may need it for backwards compatibility) and
the compression codec used for the event data.
With the new approach, aside from reducing the load on the NN, there's
also a lot less remote calls needed when reading the log directory.
Author: Marcelo Vanzin <vanzin@cloudera.com>
Closes#1222 from vanzin/hist-server-single-log and squashes the following commits:
cc8f5de [Marcelo Vanzin] Store header in plain text.
c7e6123 [Marcelo Vanzin] Update comment.
59c561c [Marcelo Vanzin] Review feedback.
216c5a3 [Marcelo Vanzin] Review comments.
dce28e9 [Marcelo Vanzin] Fix log overwrite test.
f91c13e [Marcelo Vanzin] Handle "spark.eventLog.overwrite", and add unit test.
346f0b4 [Marcelo Vanzin] Review feedback.
ed0023e [Marcelo Vanzin] Merge branch 'master' into hist-server-single-log
3f4500f [Marcelo Vanzin] Unit test for SPARK-3697.
45c7a1f [Marcelo Vanzin] Version of SPARK-3697 for this branch.
b3ee30b [Marcelo Vanzin] Merge branch 'master' into hist-server-single-log
a6d5c50 [Marcelo Vanzin] Merge branch 'master' into hist-server-single-log
16fd491 [Marcelo Vanzin] Use unique log directory for each codec.
0ef3f70 [Marcelo Vanzin] Merge branch 'master' into hist-server-single-log
d93c44a [Marcelo Vanzin] Add a newline to make the header more readable.
9e928ba [Marcelo Vanzin] Add types.
bd6ba8c [Marcelo Vanzin] Review feedback.
a624a89 [Marcelo Vanzin] Merge branch 'master' into hist-server-single-log
04364dc [Marcelo Vanzin] Merge branch 'master' into hist-server-single-log
bb7c2d3 [Marcelo Vanzin] Fix scalastyle warning.
16661a3 [Marcelo Vanzin] Simplify some internal code.
cc6bce4 [Marcelo Vanzin] Some review feedback.
a722184 [Marcelo Vanzin] Do not encode metadata in log file name.
3700586 [Marcelo Vanzin] Restore log flushing.
f677930 [Marcelo Vanzin] Fix botched rebase.
ae571fa [Marcelo Vanzin] Fix end-to-end event logger test.
9db0efd [Marcelo Vanzin] Show prettier name in UI.
8f42274 [Marcelo Vanzin] Make history server parse old-style log directories.
6251dd7 [Marcelo Vanzin] Make event logger use a single file.
