S3ServiceException when using AWS RedshiftBasicEmitter - amazon-redshift

Question

I am using the sample AWS kinesis/redshift code from GitHub. I ran the code in an EC2 instance and ran into the following exception. Note that the emitting from Kinesis to S3 actually succeeded. But the emitting from S3 to Redshift failed. As both emitters in the same program used the same credentials, I am very puzzled why only one of them failed!?
I understand most people getting “The AWS Access Key Id you provided does not exist in our records” exception probably may have issue setting up the S3 key pair properly. But it does not seem to be the case here as emitting to S3 succeeded. If the credentials do not have read access, it should throw an authorization error instead.
Please comment if you have any insight.
Mar 16, 2014 4:32:49 AM com.amazonaws.services.kinesis.connectors.s3.S3Emitter emit
INFO: Successfully emitted 31 records to S3 in s3://mybucket/495362565978733426345566872055061454326385819810529281-49536256597873342638068737503047822713441029589972287489
Mar 16, 2014 4:32:50 AM com.amazonaws.services.kinesis.connectors.redshift.RedshiftBasicEmitter executeStatement
SEVERE: org.postgresql.util.PSQLException: ERROR: S3ServiceException:The AWS Access Key Id you provided does not exist in our records.,Status 403,Error InvalidAccessKeyId,Rid 5TY6Y784TT67,ExtRid qKzklJflmmgnhtttthbce+8T0NIR/sdd4RgffTgfgfdfgdfgfffgghgdse56f,CanRetry 1
Detail:
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error: S3ServiceException:The AWS Access Key Id you provided does not exist in our records.,Status 403,Error InvalidAccessKeyId,Rid 5TY6Y784TT67,ExtRid qKzklJflmmgnhtttthbce+8T0NIR/sdd4RgffTgfgfdfgdfgfffgghgdse56f,CanRetry 1
code: 8001
context: Listing bucket=mfpredshift prefix=49536256597873342637951299872055061454326385819810529281-49536256597873342638068737503047822713441029589972287489
query: 3464108
location: s3_utility.cpp:536
process: padbmaster [pid=8116]
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Mar 16, 2014 4:32:50 AM com.amazonaws.services.kinesis.connectors.redshift.RedshiftBasicEmitter emit
SEVERE: java.io.IOException: org.postgresql.util.PSQLException: ERROR: S3ServiceException:The AWS Access Key Id you provided does not exist in our records.,Status 403,Error InvalidAccessKeyId,Rid 5TY6Y784TT67,ExtRid qKzklJflmmgnhtttthbce+8T0NIR/sdd4RgffTgfgfdfgdfgfffgghgdse56f,CanRetry 1
Detail:
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error: S3ServiceException:The AWS Access Key Id you provided does not exist in our records.,Status 403,Error InvalidAccessKeyId,Rid 5TY6Y784TT67,ExtRid qKzklJflmmgnhtttthbce+8T0NIR/sdd4RgffTgfgfdfgdfgfffgghgdse56f,CanRetry 1
code: 8001
context: Listing bucket=mybucket prefix=495362565978733426345566872055061454326385819810529281-49536256597873342638068737503047822713441029589972287489
query: 3464108
location: s3_utility.cpp:536
process: padbmaster [pid=8116]
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Answer 1

I encountered the same errors. I'm using IAM role to get credentials. In my case, it was solved by modify RedshiftBasicEmitter to add ;token=TOKEN to CREDENTIALS parameter (finally I created my own IEmitter).
See http://docs.aws.amazon.com/redshift/latest/dg/r_COPY.html