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Posted to reviews@spark.apache.org by ssaavedra <gi...@git.apache.org> on 2018/01/24 12:28:09 UTC
[GitHub] spark pull request #20383: [SPARK-23200] Reset Kubernetes-specific config on...
GitHub user ssaavedra opened a pull request:
https://github.com/apache/spark/pull/20383
[SPARK-23200] Reset Kubernetes-specific config on Checkpoint restore
## What changes were proposed in this pull request?
When using the Kubernetes cluster-manager and spawning a Streaming workload, it is important to reset many spark.kubernetes.* properties that are generated by spark-submit but which would get rewritten when restoring a Checkpoint. This is so, because the spark-submit codepath creates Kubernetes resources, such as a ConfigMap, a Secret and other variables, which have an autogenerated name and the previous one will not resolve anymore.
In short, this change enables checkpoint restoration for streaming workloads, and thus enables Spark Streaming workloads in Kubernetes, which were not possible to restore from a checkpoint before if the workload went down.
## How was this patch tested?
This patch was tested with the twitter-streaming example in AWS, using checkpoints in s3 with the s3a:// protocol, as supported by Hadoop.
This is similar to the YARN related code for resetting a Spark Streaming workload, but for the Kubernetes scheduler. I'm adding the initcontainers properties because even if the discussion is not completely settled on the mailing list, my understanding is that at this moment they are going forward for the moment.
For a previous discussion, see the non-rebased work at: https://github.com/apache-spark-on-k8s/spark/pull/516
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ssaavedra/spark fix-k8s-checkpointing
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20383.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 #20383
----
commit cd9b73a1e85c45886243ae7176a1179de7329c16
Author: Santiago Saavedra <ss...@...>
Date: 2017-10-17T13:18:03Z
Reset Kubernetes-specific config on Checkpoint restore
Several configuration parameters related to Kubernetes need to be
reset, as they are changed with each invokation of spark-submit and
thus prevents recovery of Spark Streaming tasks.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/20383
hmmm.. The target version in the JIRA is 2.4.0, and we about to release 2.3.0, are we sure we want to backport?
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/20383
Can one of the admins verify this patch?
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20383
We are going to cut another RC?
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20383
Jenkins test this please
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/20383
Can one of the admins verify this patch?
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by ssaavedra <gi...@git.apache.org>.
Github user ssaavedra commented on the issue:
https://github.com/apache/spark/pull/20383
Yes, sorry for the misunderstanding I was also probably too eager with this. However, if the changes I'm stating up there don't work, I am not sure what I'm missing now. I'll take a further look at it tomorrow. If any of you is at FOSDEM this weekend we could take a look at it in there.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/20383
Merging to Master, thanks!
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20383
So you have tested this on latest Spark 2.3.0 bit?
Test aside, do people think it is useful to include this fix in the 2.3.0 release?
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by foxish <gi...@git.apache.org>.
Github user foxish commented on the issue:
https://github.com/apache/spark/pull/20383
That plan LGTM - we can merge into 2.3 after removing the non-existent config, and getting a clean test run against the 2.3 branch.
Should be low risk.
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[GitHub] spark pull request #20383: [SPARK-23200] Reset Kubernetes-specific config on...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/20383
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20383
without this fix streaming app can't properly recovery from checkpoint, correct?
that seems fairly important to me.
was apache-spark-on-k8s/spark-integration done before this PR was opened?
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/20383
**[Test build #86596 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/86596/testReport)** for PR 20383 at commit [`cd9b73a`](https://github.com/apache/spark/commit/cd9b73a1e85c45886243ae7176a1179de7329c16).
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20383
my take is not that it doesn't work but some names are out of date because it was done for the k8s fork.
I think we should revert the commit and wait till it is tested out complete. WDYT?
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by ssaavedra <gi...@git.apache.org>.
Github user ssaavedra commented on the issue:
https://github.com/apache/spark/pull/20383
Sorry, I hadn't answered yet because it seems my patch does not work cleanly on 2.3. Many names were rewritten as part of the merge and some logic on how the executor pods look up the configMap had changed. I'll have to take a better look at it.
I already changed all `initcontainer` appearances for `initContainer` and so on, according to the parameters at the Config.scala for kubernetes, but to no avail yet. @foxish maybe you have a hint on where to look? It seems that the new containers are still looking for the old ConfigMap.
That must happen due to some property in the Checkpoint getting restored by the driver. Thus, the driver gets the correct ConfigMap as it is created by spark-submit, but the executors don't because the driver restores the Checkpoint and thereon the old property value is used to put in the ConfigMap names (however the executors get named correctly).
This is an example execution on my test environment.
```
$ kubectl -nssaavedraspark get pod spark-pi-2-5081f5d7a88332da955417b6582f22f5-driver spark-pi-2-5081f5d7a88332da955417b6582f22f5-exec-1 -o json | jq '.items[]| {"configMap": (.spec.volumes[] | select(.configMap?).configMap.name), "appselector": .metadata.labels."spark-app-selector", "name": .metadata.name}'
```
```
{
"configMap": "spark-pi-2-5081f5d7a88332da955417b6582f22f5-init-config",
"appselector": "spark-8be5e27c750e4384964fbcb93d7f4b1c",
"name": "spark-pi-2-5081f5d7a88332da955417b6582f22f5-driver"
}
{
"configMap": "spark-pi-2-59025c48a8483e749e02894b70fd371f-init-config",
"appselector": "spark-application-1517424700542",
"name": "spark-pi-2-5081f5d7a88332da955417b6582f22f5-exec-1"
}
```
I have already made these changes (besides what's in the PR):
```
--- a/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
@@ -48,25 +48,27 @@ class Checkpoint(ssc: StreamingContext, val checkpointTime: Time)
// Reload properties for the checkpoint application since user wants to set a reload property
// or spark had changed its value and user wants to set it back.
val propertiesToReload = List(
"spark.yarn.app.id",
"spark.yarn.app.attemptId",
"spark.driver.host",
"spark.driver.bindAddress",
"spark.driver.port",
"spark.kubernetes.driver.pod.name",
"spark.kubernetes.executor.podNamePrefix",
- "spark.kubernetes.initcontainer.configMapName",
- "spark.kubernetes.initcontainer.configMapKey",
- "spark.kubernetes.initcontainer.downloadJarsResourceIdentifier",
- "spark.kubernetes.initcontainer.downloadJarsSecretLocation",
- "spark.kubernetes.initcontainer.downloadFilesResourceIdentifier",
- "spark.kubernetes.initcontainer.downloadFilesSecretLocation",
- "spark.kubernetes.initcontainer.remoteJars",
- "spark.kubernetes.initcontainer.remoteFiles",
- "spark.kubernetes.mountdependencies.jarsDownloadDir",
- "spark.kubernetes.mountdependencies.filesDownloadDir",
+ "spark.kubernetes.initContainer.configMapName",
+ "spark.kubernetes.initContainer.configMapKey",
+ // "spark.kubernetes.initContainer.remoteJars",
+ // "spark.kubernetes.initContainer.remoteFiles",
+ // "spark.kubernetes.mountDependencies.jarsDownloadDir",
+ // "spark.kubernetes.mountDependencies.filesDownloadDir",
+ // "spark.kubernetes.mountDependencies.timeout",
+ // "spark.kubernetes.mountDependencies.maxSimultaneousDownloads",
"spark.master",
"spark.yarn.jars",
"spark.yarn.keytab",
```
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by ssaavedra <gi...@git.apache.org>.
Github user ssaavedra commented on the issue:
https://github.com/apache/spark/pull/20383
I can probably take a look at testing this over 2.3.0-rc2 on Monday. I did not test this on a clean 2.3.0-ish branch.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by ssaavedra <gi...@git.apache.org>.
Github user ssaavedra commented on the issue:
https://github.com/apache/spark/pull/20383
However, Spark Streaming should always be used with checkpoint enabled if you are using at least `updateStateByKey` or `reduceByKeyAndWindow` and you don't want to lose data, or miscalculate results.
I'm not sure why foxish tagged this as 2.4.0 when reported the issue, probably because we were already in 2.3.0-rc2, but if there's going to be another RC (which it seems per the latest vote in spark-dev) then I'm in favor of the backport.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/20383
@ssaavedra why don't you submit a follow-up PR to remove the inexistent configuration as mentioned above?
If we agreed to backport to 2.3, then you can create another backport PR against branch 2.3.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by zsxwing <gi...@git.apache.org>.
Github user zsxwing commented on the issue:
https://github.com/apache/spark/pull/20383
LGTM
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/20383
@ssaavedra Do you mean the your current patch doesn't work even for master branch? In case of that do we need to revert the current patch? CC @felixcheung @foxish .
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/20383
Merged build finished. Test PASSed.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20383
@zsxwing @jerryshao
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[GitHub] spark pull request #20383: [SPARK-23200] Reset Kubernetes-specific config on...
Posted by foxish <gi...@git.apache.org>.
Github user foxish commented on a diff in the pull request:
https://github.com/apache/spark/pull/20383#discussion_r164084503
--- Diff: streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala ---
@@ -53,6 +53,21 @@ class Checkpoint(ssc: StreamingContext, val checkpointTime: Time)
"spark.driver.host",
"spark.driver.bindAddress",
"spark.driver.port",
+ "spark.kubernetes.driver.pod.name",
+ "spark.kubernetes.executor.podNamePrefix",
+ "spark.kubernetes.initcontainer.executor.configmapname",
+ "spark.kubernetes.initcontainer.executor.configmapkey",
+ "spark.kubernetes.initcontainer.downloadJarsResourceIdentifier",
+ "spark.kubernetes.initcontainer.downloadJarsSecretLocation",
+ "spark.kubernetes.initcontainer.downloadFilesResourceIdentifier",
+ "spark.kubernetes.initcontainer.downloadFilesSecretLocation",
+ "spark.kubernetes.initcontainer.remoteJars",
+ "spark.kubernetes.initcontainer.remoteFiles",
+ "spark.kubernetes.mountdependencies.jarsDownloadDir",
+ "spark.kubernetes.mountdependencies.filesDownloadDir",
+ "spark.kubernetes.initcontainer.executor.stagingServerSecret.name",
--- End diff --
Sorry - should have caught this. The `stagingServer` configs don't exist in upstream. We should remove those, although it's a NOP here I'm guessing.
@ssaavedra @felixcheung
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[GitHub] spark pull request #20383: [SPARK-23200] Reset Kubernetes-specific config on...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/20383#discussion_r164106372
--- Diff: streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala ---
@@ -53,6 +53,21 @@ class Checkpoint(ssc: StreamingContext, val checkpointTime: Time)
"spark.driver.host",
"spark.driver.bindAddress",
"spark.driver.port",
+ "spark.kubernetes.driver.pod.name",
+ "spark.kubernetes.executor.podNamePrefix",
+ "spark.kubernetes.initcontainer.executor.configmapname",
+ "spark.kubernetes.initcontainer.executor.configmapkey",
+ "spark.kubernetes.initcontainer.downloadJarsResourceIdentifier",
+ "spark.kubernetes.initcontainer.downloadJarsSecretLocation",
+ "spark.kubernetes.initcontainer.downloadFilesResourceIdentifier",
+ "spark.kubernetes.initcontainer.downloadFilesSecretLocation",
+ "spark.kubernetes.initcontainer.remoteJars",
+ "spark.kubernetes.initcontainer.remoteFiles",
+ "spark.kubernetes.mountdependencies.jarsDownloadDir",
+ "spark.kubernetes.mountdependencies.filesDownloadDir",
+ "spark.kubernetes.initcontainer.executor.stagingServerSecret.name",
--- End diff --
I think it will not affect the correctness of streaming application.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by foxish <gi...@git.apache.org>.
Github user foxish commented on the issue:
https://github.com/apache/spark/pull/20383
I'm ok with backporting it once the non-existent config is removed and we're confident we're covering all the requisite config. Also would make sense to have a test under https://github.com/apache-spark-on-k8s/spark-integration @ssaavedra
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/20383
This is not a big issue unless when we run Spark Streaming with checkpoint enabled. I'm not sure for now it is OK to add to 2.3.0 release (as this is not a block issue).
@felixcheung up to you to decide whether this needs to be backported 😄 .
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/20383
I agree. sorry to merge it so quickly, let me revert it.
@ssaavedra would you please submit PR again when everything is done, thanks!
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by felixcheung <gi...@git.apache.org>.
Github user felixcheung commented on the issue:
https://github.com/apache/spark/pull/20383
actually, can we backport this to branch-2.3? k8s is added in 2.3.0
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by ssaavedra <gi...@git.apache.org>.
Github user ssaavedra commented on the issue:
https://github.com/apache/spark/pull/20383
spark-integration was created much later. I originally opened this as https://github.com/apache-spark-on-k8s/spark/pull/516 last September. However, the integration tests repo exists since December 1st.
It would be interesting to have a test, but we'd need to set up checkpointing. In my test setup I used AWS S3 for the checkpoint storage but in order not to depend on that, we'd have to deploy a distributed filesystem supported by Hadoop in minikube. Although configuring it should be an orthogonal problem to this test scenario, but we may run into other integration issues.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/20383
**[Test build #86596 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/86596/testReport)** for PR 20383 at commit [`cd9b73a`](https://github.com/apache/spark/commit/cd9b73a1e85c45886243ae7176a1179de7329c16).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by jerryshao <gi...@git.apache.org>.
Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/20383
LGTM.
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[GitHub] spark issue #20383: [SPARK-23200] Reset Kubernetes-specific config on Checkp...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/20383
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