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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15426) S3guard DDB throttle events on reads not being retried
Date Wed, 25 Jul 2018 21:14:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16556275#comment-16556275
] 

Steve Loughran commented on HADOOP-15426:
-----------------------------------------

working with existing DDB tables. Note that you can't change capacity that often
{code}
[ERROR] testBatchedWriteExceedsProvisioned(org.apache.hadoop.fs.s3a.s3guard.ITestDynamoDBMetadataStoreScale)
 Time elapsed: 2.144 s  <<< ERROR!
org.apache.hadoop.fs.s3a.AWSServiceThrottledException: ProvisionTable on hwdev-steve-new:
com.amazonaws.services.dynamodbv2.model.LimitExceededException: Subscriber limit exceeded:
Provisioned throughput decreases are limited within a given UTC day. After the first 4 decreases,
each subsequent decrease in the same UTC day can be performed at most once every 3600 seconds.
Number of decreases today: 6. Last decrease at Wednesday, July 25, 2018 8:48:14 PM UTC. Next
decrease can be made at Wednesday, July 25, 2018 9:48:14 PM UTC (Service: AmazonDynamoDBv2;
Status Code: 400; Error Code: LimitExceededException; Request ID: GKD04NJL981O84MNB30G77RCGVVV4KQNSO5AEMVJF66Q9ASUAAJG):
Subscriber limit exceeded: Provisioned throughput decreases are limited within a given UTC
day. After the first 4 decreases, each subsequent decrease in the same UTC day can be performed
at most once every 3600 seconds. Number of decreases today: 6. Last decrease at Wednesday,
July 25, 2018 8:48:14 PM UTC. Next decrease can be made at Wednesday, July 25, 2018 9:48:14
PM UTC (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: LimitExceededException; Request
ID: GKD04NJL981O84MNB30G77RCGVVV4KQNSO5AEMVJF66Q9ASUAAJG)
	at org.apache.hadoop.fs.s3a.s3guard.ITestDynamoDBMetadataStoreScale.testBatchedWriteExceedsProvisioned(ITestDynamoDBMetadataStoreScale.java:105)
Caused by: com.amazonaws.services.dynamodbv2.model.LimitExceededException: Subscriber limit
exceeded: Provisioned throughput decreases are limited within a given UTC day. After the first
4 decreases, each subsequent decrease in the same UTC day can be performed at most once every
3600 seconds. Number of decreases today: 6. Last decrease at Wednesday, July 25, 2018 8:48:14
PM UTC. Next decrease can be made at Wednesday, July 25, 2018 9:48:14 PM UTC (Service: AmazonDynamoDBv2;
Status Code: 400; Error Code: LimitExceededException; Request ID: GKD04NJL981O84MNB30G77RCGVVV4KQNSO5AEMVJF66Q9ASUAAJG)
	at org.apache.hadoop.fs.s3a.s3guard.ITestDynamoDBMetadataStoreScale.testBatchedWriteExceedsProvisioned(ITestDynamoDBMetadataStoreScale.java:105)
{code}


> S3guard DDB throttle events on reads not being retried
> ------------------------------------------------------
>
>                 Key: HADOOP-15426
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15426
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.1.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Blocker
>         Attachments: Screen Shot 2018-07-24 at 15.16.46.png
>
>
> managed to create on a parallel test run
> {code}
> org.apache.hadoop.fs.s3a.AWSServiceThrottledException: delete on s3a://hwdev-steve-ireland-new/fork-0005/test/existing-dir/existing-file:
com.amazonaws.services.dynamodbv2.model.ProvisionedThroughputExceededException: The level
of configured provisioned throughput for the table was exceeded. Consider increasing your
provisioning level with the UpdateTable API. (Service: AmazonDynamoDBv2; Status Code: 400;
Error Code: ProvisionedThroughputExceededException; Request ID: RDM3370REDBBJQ0SLCLOFC8G43VV4KQNSO5AEMVJF66Q9ASUAAJG):
The level of configured provisioned throughput for the table was exceeded. Consider increasing
your provisioning level with the UpdateTable API. (Service: AmazonDynamoDBv2; Status Code:
400; Error Code: ProvisionedThroughputExceededException; Request ID: RDM3370REDBBJQ0SLCLOFC8G43VV4KQNSO5AEMVJF66Q9ASUAAJG)
> 	at 
> {code}
> We should be able to handle this. 400 "bad things happened" error though, not the 503
from S3.
> h3. We need a retry handler for DDB throttle operations



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