[NUTCH-2494] Fetcher: java.lang.IllegalArgumentException: Wrong FS: s3

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.14
• Fix Version/s: 1.15
• Component/s: fetcher, parser

Environment

• AWS EMR Cluster
• AWS S3
• Hadoop 2.2.7

• Assignee: Sebastian Nagel
• Reporter: Ashraful Islam
• Created: 11/Jan/18 10:17
• Updated: 01/Oct/19 14:29
• Resolved: 29/Jan/18 15:41

Description

We are using nutch 1.14 in AWS EMR Cluster (Hadoop 2.2.7). trying to use S3 as main storage.

We are using the below command.

bin/crawl -s s3://nutch-emr-cluster/test/crawl/urls s3://nutch-emr-cluster/test/crawl 1

Injector and Generator completed successfully without any error and data written perfectly into S3. But in the Fetcher and Parser steps we are getting IllegalArgumentException

Full stacktrace

18/01/11 07:16:52 ERROR fetcher.Fetcher: Fetcher: java.lang.IllegalArgumentException: Wrong FS: s3://nutch-emr-cluster/test/crawl/segments/20180111071602/crawl_fetch, expected: hdfs://ip-172-31-26-180.eu-west-1.compute.internal:8020
	at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:653)
	at org.apache.hadoop.hdfs.DistributedFileSystem.getPathName(DistributedFileSystem.java:194)
	at org.apache.hadoop.hdfs.DistributedFileSystem.access$000(DistributedFileSystem.java:106)
	at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1305)
	at org.apache.hadoop.hdfs.DistributedFileSystem$22.doCall(DistributedFileSystem.java:1301)
	at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
	at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1317)
	at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1430)
	at org.apache.nutch.fetcher.FetcherOutputFormat.checkOutputSpecs(FetcherOutputFormat.java:55)
	at org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:268)
	at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:139)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1290)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1287)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1287)
	at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:575)
	at org.apache.hadoop.mapred.JobClient$1.run(JobClient.java:570)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)
	at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:570)
	at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:561)
	at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:870)
	at org.apache.nutch.fetcher.Fetcher.fetch(Fetcher.java:486)
	at org.apache.nutch.fetcher.Fetcher.run(Fetcher.java:521)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
	at org.apache.nutch.fetcher.Fetcher.main(Fetcher.java:495)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

Issue Links

• is related to: NUTCH-2281 Support non-default FileSystem
• links to: GitHub Pull Request #274