NativeS3FileSystem always tries to create a bucket, even when used for
read-only workflows.
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Key: HADOOP-4684
URL: https://issues.apache.org/jira/browse/HADOOP-4684
Project: Hadoop Core
Issue Type: Bug
Components: fs/s3
Affects Versions: 0.19.0
Environment: I tried this in Mac OSX Leopard and Ubuntu Linux on EC2
Reporter: Elias Torres
Priority: Minor
Fix For: 0.19.0
I'm running two types of workflow. The first is a set of map jobs that read
from S3 using s3n://ID:[EMAIL PROTECTED]/ as input and HDFS as output. The
other is using distcp as a backup tool to copy the outputs of other jobs using
distcp.
bq. hadoop distcp hdfs://host:50001/user/root/from/ s3n://ID:[EMAIL PROTECTED]/
Unfortunately, I'm getting too many failures of this kind:
{code}
08/11/19 16:08:27 WARN mapred.JobClient: Use GenericOptionsParser for parsing
the arguments. Applications should implement Tool for the same.
org.apache.hadoop.fs.s3.S3Exception: org.jets3t.service.S3ServiceException: S3
PUT failed for '/' XML Error Message: <?xml version="1.0"
encoding="UTF-8"?><Error><Code>OperationAborted</Code><Message>A conflicting
conditional operation is currently in progress against this resource. Please
try
again.</Message><RequestId>324E696A4BCA8731</RequestId><HostId>{REMOVED}</HostId></Error>
at
org.apache.hadoop.fs.s3native.Jets3tNativeFileSystemStore.createBucket(Jets3tNativeFileSystemStore.java:74)
at
org.apache.hadoop.fs.s3native.Jets3tNativeFileSystemStore.initialize(Jets3tNativeFileSystemStore.java:63)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
at org.apache.hadoop.fs.s3native.$Proxy2.initialize(Unknown Source)
at
org.apache.hadoop.fs.s3native.NativeS3FileSystem.initialize(NativeS3FileSystem.java:215)
at
org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1339)
at org.apache.hadoop.fs.FileSystem.access$300(FileSystem.java:56)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1351)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:213)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:175)
at
org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:158)
at
org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:210)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:742)
at
org.apache.hadoop.streaming.StreamJob.submitAndMonitorJob(StreamJob.java:925)
at org.apache.hadoop.streaming.StreamJob.go(StreamJob.java:115)
at
org.apache.hadoop.streaming.HadoopStreaming.main(HadoopStreaming.java:33)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:155)
at org.apache.hadoop.mapred.JobShell.run(JobShell.java:54)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at org.apache.hadoop.mapred.JobShell.main(JobShell.java:68)
Caused by: org.jets3t.service.S3ServiceException: S3 PUT failed for '/' XML
Error Message: <?xml version="1.0"
encoding="UTF-8"?><Error><Code>OperationAborted</Code><Message>A conflicting
conditional operation is currently in progress against this resource. Please
try
again.</Message><RequestId>{REMOVED}</RequestId><HostId>{REMOVED}</HostId></Error>
at
org.jets3t.service.impl.rest.httpclient.RestS3Service.performRequest(RestS3Service.java:424)
at
org.jets3t.service.impl.rest.httpclient.RestS3Service.performRestPut(RestS3Service.java:734)
at
org.jets3t.service.impl.rest.httpclient.RestS3Service.createObjectImpl(RestS3Service.java:1357)
at
org.jets3t.service.impl.rest.httpclient.RestS3Service.createBucketImpl(RestS3Service.java:1234)
at org.jets3t.service.S3Service.createBucket(S3Service.java:1390)
at org.jets3t.service.S3Service.createBucket(S3Service.java:1158)
at org.jets3t.service.S3Service.createBucket(S3Service.java:1177)
at
org.apache.hadoop.fs.s3native.Jets3tNativeFileSystemStore.createBucket(Jets3tNativeFileSystemStore.java:69)
... 29 more
{code}
The issue is that Jets3tNativeFileSystemStore always tries to create a bucket
during initialization. I'm sure that's a good thing for when s3n is used to
write output, but for read operations, it'd be best if it checked for existence
first. IMHO.
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