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From "Virajith Jalaparti (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-12685) [READ] FsVolumeImpl exception when scanning Provided storage volume
Date Fri, 03 Nov 2017 20:47:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Virajith Jalaparti reassigned HDFS-12685:
-----------------------------------------

    Assignee: Virajith Jalaparti

> [READ] FsVolumeImpl exception when scanning Provided storage volume
> -------------------------------------------------------------------
>
>                 Key: HDFS-12685
>                 URL: https://issues.apache.org/jira/browse/HDFS-12685
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Ewan Higgs
>            Assignee: Virajith Jalaparti
>            Priority: Major
>         Attachments: HDFS-12685-HDFS-9806.001.patch
>
>
> I left a Datanode running overnight and found this in the logs in the morning:
> {code}
> 2017-10-18 23:51:54,391 ERROR datanode.DirectoryScanner: Error compiling report for the
volume, StorageId: DS-e75ebc3c-6b12-424e-875a-a4ae1a4dcc29                               
                                                            
> java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: URI scheme
is not "file"                                                                            
                                                            
>         at java.util.concurrent.FutureTask.report(FutureTask.java:122)              
                                                                                         
                                                               
>         at java.util.concurrent.FutureTask.get(FutureTask.java:192)                 
                                                                                         
                                                               
>         at org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.getDiskReport(DirectoryScanner.java:544)
                                                                                         
                                        
>         at org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.scan(DirectoryScanner.java:393)
                                                                                         
                                                 
>         at org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.reconcile(DirectoryScanner.java:375)
                                                                                         
                                            
>         at org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.run(DirectoryScanner.java:320)
                                                                                         
                                                  
>         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)  
                                                                                         
                                                               
>         at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)         
                                                                                         
                                                               
>         at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
                                                                                         
                   
>         at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
                                                                                         
                          
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
                                                                                         
                                                         
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
                                                                                         
                                                         
>         at java.lang.Thread.run(Thread.java:748)                                    
                                                                                         
                                                               
> Caused by: java.lang.IllegalArgumentException: URI scheme is not "file"             
                                                                                         
                                                               
>         at java.io.File.<init>(File.java:421)                                 
                                                                                         
                                                                     
>         at org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi$ScanInfo.<init>(FsVolumeSpi.java:319)
                                                                                         
                                      
>         at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ProvidedVolumeImpl$ProvidedBlockPoolSlice.compileReport(ProvidedVolumeImpl.java:155)
                                                                                        
>         at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.ProvidedVolumeImpl.compileReport(ProvidedVolumeImpl.java:493)
                                                                                         
                     
>         at org.apache.hadoop.hdfs.server.datanode.DirectoryScanner$ReportCompiler.call(DirectoryScanner.java:620)
                                                                                         
                                  
>         at org.apache.hadoop.hdfs.server.datanode.DirectoryScanner$ReportCompiler.call(DirectoryScanner.java:581)
                                                                                         
                                  
>         at java.util.concurrent.FutureTask.run(FutureTask.java:266)                 
                                                                                         
                                                               
>         ... 3 more 
> {code}
> The code in question tries to make a File from the URI (in this case {{s3a}} but anything
in Provided storage would likely break here:
> {code}
>     public ScanInfo(long blockId, File blockFile, File metaFile,
>         FsVolumeSpi vol, FileRegion fileRegion, long length) {
>       this.blockId = blockId;
>       String condensedVolPath =
>           (vol == null || vol.getBaseURI() == null) ? null :
>             getCondensedPath(new File(vol.getBaseURI()).getAbsolutePath()); // <-------
>       this.blockSuffix = blockFile == null ? null :
>         getSuffix(blockFile, condensedVolPath);
>       this.blockLength = length;
>       if (metaFile == null) {
>         this.metaSuffix = null;
>       } else if (blockFile == null) {
>         this.metaSuffix = getSuffix(metaFile, condensedVolPath);
>       } else {
>         this.metaSuffix = getSuffix(metaFile,
>             condensedVolPath + blockSuffix);
>       }
>       this.volume = vol;
>       this.fileRegion = fileRegion;
>     }
> {code}



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