错误：使用mongodb启动Apache坚果时

Question

when i try to run, following error comes, In mongodb logs one connection accepted and end immediately.how solve it?

$ bin/crawl conf/urls/seeds.txt tuto 1 No SOLRURL specified. Skipping indexing. Injecting seed URLs /e/apache-nutch/apache-nutch-2.3.1/runtime/local/bin/nutch inject conf/urls/seeds.txt -crawlId tuto InjectorJob: starting at 2016-10-01 18:15:14 InjectorJob: Injecting urlDir: conf/urls/seeds.txt InjectorJob: Using class org.apache.gora.mongodb.store.MongoStore as the Gora storage class. InjectorJob: java.lang.NullPointerException at java.lang.ProcessBuilder.start(ProcessBuilder.java:1010) at org.apache.hadoop.util.Shell.runCommand(Shell.java:482) at org.apache.hadoop.util.Shell.run(Shell.java:455) at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:702) at org.apache.hadoop.util.Shell.execCommand(Shell.java:791) at org.apache.hadoop.util.Shell.execCommand(Shell.java:774) at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:646) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:434) at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:281) at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:125) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:348) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282) at java.security.AccessController.doPrivileged(Native Me thod) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282) at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303) at org.apache.nutch.util.NutchJob.waitForCompletion(NutchJob.java:115) at org.apache.nutch.crawl.InjectorJob.run(InjectorJob.java:231) at org.apache.nutch.crawl.InjectorJob.inject(InjectorJob.java:252) at org.apache.nutch.crawl.InjectorJob.run(InjectorJob.java:275) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.nutch.crawl.InjectorJob.main(InjectorJob.java:284)

Answer 1

I believe the newest version of Nutch uses

# bin/nutch inject seedDirectory/

This worked for me at least.

Answer 2

I solved this issue by just removing two lines ie:

[field name="sitemaps" docfield="sitemaps" type="document"] 

and

[field name="stmPriority" docfield="stmPriority" type="int32"] 

from gora-mongodb-mapping.xml file in conf folder of nutch. Hope it will help you..