Hadoop distcp失败并出现错误“;设备上没有剩余空间”;
我正在将HDFS快照复制到S3存储桶,错误如下: 我正在执行的命令是: hadoop distcp/.snapshot/$SNAPSHOTNAME s3a://$ACCESSKEY:$SECRETKEY@$BUCKET/$SNAPSHOTNAMEHadoop distcp失败并出现错误“;设备上没有剩余空间”;,hadoop,amazon-s3,hdfs,snapshot,distcp,Hadoop,Amazon S3,Hdfs,Snapshot,Distcp,我正在将HDFS快照复制到S3存储桶,错误如下: 我正在执行的命令是: hadoop distcp/.snapshot/$SNAPSHOTNAME s3a://$ACCESSKEY:$SECRETKEY@$BUCKET/$SNAPSHOTNAME 15/08/20 06:50:07 INFO mapreduce.Job: map 38% reduce 0% 15/08/20 06:50:08 INFO mapreduce.Job: map 39% reduce 0% 15/08/20
15/08/20 06:50:07 INFO mapreduce.Job: map 38% reduce 0%
15/08/20 06:50:08 INFO mapreduce.Job: map 39% reduce 0%
15/08/20 06:52:15 INFO mapreduce.Job: map 41% reduce 0%
15/08/20 06:52:37 INFO mapreduce.Job: Task Id : attempt_1439998402428_0006_m_000004_0, Status : FAILED
Error: java.io.IOException: File copy failed: hdfs://mycluster/.snapshot/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/tmp/hive/vladmetodiev/6da8eee9-f482-4d07-96dc-87ff77a4efe4/hive_2015-07-23_17-12-21_989_8312247652079703611-121/-ext-10001/000035_0 --> s3n://AKIAJPPHQ6RXAPWCFMAA:RVZ9Q1+ezHkUVPEbasg4BUIGAS59C27bhJiNNlgD@ul-pdc-eu/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/tmp/hive/vladmetodiev/6da8eee9-f482-4d07-96dc-87ff77a4efe4/hive_2015-07-23_17-12-21_989_8312247652079703611-121/-ext-10001/000035_0
at org.apache.hadoop.tools.mapred.CopyMapper.copyFileWithRetry(CopyMapper.java:284)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:252)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:50)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:784)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Caused by: java.io.IOException: Couldn't run retriable-command: Copying hdfs://mycluster/.snapshot/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/tmp/hive/vladmetodiev/6da8eee9-f482-4d07-96dc-87ff77a4efe4/hive_2015-07-23_17-12-21_989_8312247652079703611-121/-ext-10001/000035_0 to s3n://AKIAJPPHQ6RXAPWCFMAA:RVZ9Q1+ezHkUVPEbasg4BUIGAS59C27bhJiNNlgD@ul-pdc-eu/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/tmp/hive/vladmetodiev/6da8eee9-f482-4d07-96dc-87ff77a4efe4/hive_2015-07-23_17-12-21_989_8312247652079703611-121/-ext-10001/000035_0
at org.apache.hadoop.tools.util.RetriableCommand.execute(RetriableCommand.java:101)
at org.apache.hadoop.tools.mapred.CopyMapper.copyFileWithRetry(CopyMapper.java:280)
... 10 more
Caused by: java.io.IOException: No space left on device
at java.io.FileOutputStream.writeBytes(Native Method)
at java.io.FileOutputStream.write(FileOutputStream.java:345)
at java.security.DigestOutputStream.write(DigestOutputStream.java:148)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
at org.apache.hadoop.fs.s3native.NativeS3FileSystem$NativeS3FsOutputStream.write(NativeS3FileSystem.java:293)
at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:58)
at java.io.DataOutputStream.write(DataOutputStream.java:107)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.copyBytes(RetriableFileCopyCommand.java:255)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.copyToFile(RetriableFileCopyCommand.java:184)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doCopy(RetriableFileCopyCommand.java:124)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doExecute(RetriableFileCopyCommand.java:100)
at org.apache.hadoop.tools.util.RetriableCommand.execute(RetriableCommand.java:87)
... 11 more
15/08/20 06:53:13 INFO mapreduce.Job: Task Id : attempt_1439998402428_0006_m_000007_0, Status : FAILED
Error: java.io.IOException: File copy failed: hdfs://mycluster/.snapshot/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/apps/hbase/data/data/default/XXHBCL01/985fbc7692868e3315ada852bcb59e1d/tr/77c160e32bfc4175a65d6a56feaeeb6c --> s3n://AKIAJPPHQ6RXAPWCFMAA:RVZ9Q1+ezHkUVPEbasg4BUIGAS59C27bhJiNNlgD@ul-pdc-eu/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/apps/hbase/data/data/default/XXHBCL01/985fbc7692868e3315ada852bcb59e1d/tr/77c160e32bfc4175a65d6a56feaeeb6c
at org.apache.hadoop.tools.mapred.CopyMapper.copyFileWithRetry(CopyMapper.java:284)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:252)
at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:50)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:784)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Caused by: java.io.IOException: Couldn't run retriable-command: Copying hdfs://mycluster/.snapshot/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/apps/hbase/data/data/default/XXHBCL01/985fbc7692868e3315ada852bcb59e1d/tr/77c160e32bfc4175a65d6a56feaeeb6c to s3n://AKIAJPPHQ6RXAPWCFMAA:RVZ9Q1+ezHkUVPEbasg4BUIGAS59C27bhJiNNlgD@ul-pdc-eu/HDFS-SNAPSHOT-PROD.08-20-2015-06-06/apps/hbase/data/data/default/XXHBCL01/985fbc7692868e3315ada852bcb59e1d/tr/77c160e32bfc4175a65d6a56feaeeb6c
at org.apache.hadoop.tools.util.RetriableCommand.execute(RetriableCommand.java:101)
at org.apache.hadoop.tools.mapred.CopyMapper.copyFileWithRetry(CopyMapper.java:280)
... 10 more
Caused by: java.io.IOException: No space left on device
at java.io.FileOutputStream.writeBytes(Native Method)
at java.io.FileOutputStream.write(FileOutputStream.java:345)
at java.security.DigestOutputStream.write(DigestOutputStream.java:148)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
at org.apache.hadoop.fs.s3native.NativeS3FileSystem$NativeS3FsOutputStream.write(NativeS3FileSystem.java:293)
at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:58)
at java.io.DataOutputStream.write(DataOutputStream.java:107)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.copyBytes(RetriableFileCopyCommand.java:255)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.copyToFile(RetriableFileCopyCommand.java:184)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doCopy(RetriableFileCopyCommand.java:124)
at org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doExecute(RetriableFileCopyCommand.java:100)
at org.apache.hadoop.tools.util.RetriableCommand.execute(RetriableCommand.java:87)
... 11 more
但是,在4 TB左右的设备上有足够的空间,请帮助。因此我遇到了同样的问题,以下是最终对我有效的方法: hadoop distcp-D mapreduce.job.maxtaskfailures.per.tracker=1 我尝试了一些事情(在同事的帮助下),但对我有效的主要事情是- 将每个跟踪器的最大任务失败数更改为1。这主要是关键。基本上,单个节点的空间不足。因此,通过这样做,我强制作业在节点上失败后不要在节点上重试 其他我试过但没用的东西 1.增加地图绘制者的数量。(-m) 2.将重试次数从3次增加到12次。
(-D warn.app.mapreduce.client.max retries=12)文件的大小是多少?文件大小约为350 GB。不幸的是,distcp尝试先将要上载到S3的数据转移到本地目录。本地数据正在填充,产生您看到的错误。将帮助您指定一个备用目录,供distcp在上载之前用于暂存数据。