[
https://issues.apache.org/jira/browse/HDFS-1907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
CW Chung updated HDFS-1907:
---------------------------
Description:
BlockMissingException is thrown under this test scenario:
- two different processes doing concurrent file r/w: one read and the other
write on the same file
- writer keep doing file write
- reader doing position file read from beginning of the file to the visible end
of file, repeatedly
The call is basically:
byteRead = in.read(currentPosition, buffer, 0, byteToReadThisRound);
where CurrentPostion=0, buffer is a byte array buffer, byteToReadThisRound =
1024*10000;
Usually it does not fail right away. I have to read, close file, re-open the
same file a few times to create the problem. I'll pose a test program to repro
this problem after I've cleaned up a bit my current test program.
Error msg:
=========================
11/05/08 19:05:48 WARN hdfs.DFSClient: Failed to connect to /xxx.xx.xx.xxx:1004
for file /tmp/N/909NF for block
BP-1632719171-xxx.xx.xx.xxx-1303748685682:blk_-8940328094159486414_3653:java.io.IOException:
Got error for
OP_READ_BLOCK, self=/xxx.xx.xx.xxx:36405, remote=/xxx.xx.xx.xxx:1004, for file
/tmp/N/909NF, for pool
BP-1632719171-xxx.xx.xx.xxx-1303748685682 block -8940328094159486414_3653
at org.apache.hadoop.hdfs.BlockReader.newBlockReader(BlockReader.java:398)
at
org.apache.hadoop.hdfs.DFSInputStream.fetchBlockByteRange(DFSInputStream.java:631)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:51)
at TAppend.readUntilVisibleEnd(TAppend.java:441)
at TAppend.readUntilEnd(TAppend.java:474)
at TAppend.testReadOnly(TAppend.java:956)
at TAppend.main(TAppend.java:1215)
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:192)
....
##### Caught Exception in testReadOnly while reading.
java.io.IOException: Exception caught in readUntilVisibleEnd: Reader
currentOffset = 0 ; totalByteRead =0 ; latest byteRead = 0 ; visibleLen=
67824640 ; byteLeftToRead = 67824640 ; bufferLen = 10240000 ; chunkNumber= 0 ;
input pos = 0 ; byteToReadThisRound = 10240000 ; Filename = /tmp/N/909NF,
ReadParam - CurrentPostion=0, offset=0, size=10240000
at TAppend.readUntilVisibleEnd(TAppend.java:457)
at TAppend.readUntilEnd(TAppend.java:474)
at TAppend.testReadOnly(TAppend.java:956)
at TAppend.main(TAppend.java:1215)
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:192)
Caused by: org.apache.hadoop.hdfs.BlockMissingException: Could not obtain block:
BP-1632719171-xxx.xx.xx.xxx-1303748685682:blk_-8940328094159486414_3653
file=/tmp/N/909NF
at
org.apache.hadoop.hdfs.DFSInputStream.chooseDataNode(DFSInputStream.java:570)
at
org.apache.hadoop.hdfs.DFSInputStream.fetchBlockByteRange(DFSInputStream.java:618)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:51)
at TAppend.readUntilVisibleEnd(TAppend.java:441)
... 8 more
was:
BlockMissingException is thrown under this test scenario:
- two different processes doing concurrent file r/w: one read and the other
write on the same file
- writer keep doing file write
- reader doing position file read from beginning of the file to the visible end
of file, repeatedly
The call is basically:
byteRead = in.read(currentPosition, buffer, 0, byteToReadThisRound);
where CurrentPostion=0, buffer is a byte array buffer, byteToReadThisRound =
1024*10000;
Usually it does not fail right away. I have to read, close file, re-open the
same file a few times to create the problem. I'll pose a test program to repro
this problem after I've cleaned up a bit my current test program.
Error msg:
=========================
11/05/08 19:05:48 WARN hdfs.DFSClient: Failed to connect to /98.137.98.116:1004
for file /tmp/N/909NF for block
BP-1632719171-98.137.98.114-1303748685682:blk_-8940328094159486414_3653:java.io.IOException:
Got error for
OP_READ_BLOCK, self=/98.137.98.125:36405, remote=/98.137.98.116:1004, for file
/tmp/N/909NF, for pool
BP-1632719171-98.137.98.114-1303748685682 block -8940328094159486414_3653
at org.apache.hadoop.hdfs.BlockReader.newBlockReader(BlockReader.java:398)
at
org.apache.hadoop.hdfs.DFSInputStream.fetchBlockByteRange(DFSInputStream.java:631)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:51)
at TAppend.readUntilVisibleEnd(TAppend.java:441)
at TAppend.readUntilEnd(TAppend.java:474)
at TAppend.testReadOnly(TAppend.java:956)
at TAppend.main(TAppend.java:1215)
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:192)
....
##### Caught Exception in testReadOnly while reading.
java.io.IOException: Exception caught in readUntilVisibleEnd: Reader
currentOffset = 0 ; totalByteRead =0 ; latest byteRead = 0 ; visibleLen=
67824640 ; byteLeftToRead = 67824640 ; bufferLen = 10240000 ; chunkNumber= 0 ;
input pos = 0 ; byteToReadThisRound = 10240000 ; Filename = /tmp/N/909NF,
ReadParam - CurrentPostion=0, offset=0, size=10240000
at TAppend.readUntilVisibleEnd(TAppend.java:457)
at TAppend.readUntilEnd(TAppend.java:474)
at TAppend.testReadOnly(TAppend.java:956)
at TAppend.main(TAppend.java:1215)
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:192)
Caused by: org.apache.hadoop.hdfs.BlockMissingException: Could not obtain block:
BP-1632719171-98.137.98.114-1303748685682:blk_-8940328094159486414_3653
file=/tmp/N/909NF
at
org.apache.hadoop.hdfs.DFSInputStream.chooseDataNode(DFSInputStream.java:570)
at
org.apache.hadoop.hdfs.DFSInputStream.fetchBlockByteRange(DFSInputStream.java:618)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:51)
at TAppend.readUntilVisibleEnd(TAppend.java:441)
... 8 more
Environment: Run on a real cluster. Using the latest 0.23 build. (was: Run
on a real cluster
$ hadoop version
Hadoop 0.22.0.1105090202
Subversion
git://hadoopre5.corp.sk1.yahoo.com/home/y/var/builds/thread2/workspace/Cloud-HadoopCommon-0.22-Secondary
-r 3c23e43f9e262e7843e4287436429fad3224b0f7
Compiled by hadoopqa on Mon May 9 02:13:09 PDT 2011
>From source with checksum 90b5fc469fd7a1fa0ba22db893423fed
)
> BlockMissingException upon concurrent read and write: reader was doing file
> position read while writer is doing write without hflush
> ------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-1907
> URL: https://issues.apache.org/jira/browse/HDFS-1907
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs client
> Affects Versions: 0.23.0
> Environment: Run on a real cluster. Using the latest 0.23 build.
> Reporter: CW Chung
>
> BlockMissingException is thrown under this test scenario:
> - two different processes doing concurrent file r/w: one read and the other
> write on the same file
> - writer keep doing file write
> - reader doing position file read from beginning of the file to the visible
> end of file, repeatedly
> The call is basically:
> byteRead = in.read(currentPosition, buffer, 0, byteToReadThisRound);
> where CurrentPostion=0, buffer is a byte array buffer, byteToReadThisRound =
> 1024*10000;
> Usually it does not fail right away. I have to read, close file, re-open the
> same file a few times to create the problem. I'll pose a test program to
> repro this problem after I've cleaned up a bit my current test program.
> Error msg:
> =========================
> 11/05/08 19:05:48 WARN hdfs.DFSClient: Failed to connect to
> /xxx.xx.xx.xxx:1004 for file /tmp/N/909NF for block
> BP-1632719171-xxx.xx.xx.xxx-1303748685682:blk_-8940328094159486414_3653:java.io.IOException:
> Got error for
> OP_READ_BLOCK, self=/xxx.xx.xx.xxx:36405, remote=/xxx.xx.xx.xxx:1004, for
> file /tmp/N/909NF, for pool
> BP-1632719171-xxx.xx.xx.xxx-1303748685682 block -8940328094159486414_3653
> at org.apache.hadoop.hdfs.BlockReader.newBlockReader(BlockReader.java:398)
> at
> org.apache.hadoop.hdfs.DFSInputStream.fetchBlockByteRange(DFSInputStream.java:631)
> at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
> at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:51)
> at TAppend.readUntilVisibleEnd(TAppend.java:441)
> at TAppend.readUntilEnd(TAppend.java:474)
> at TAppend.testReadOnly(TAppend.java:956)
> at TAppend.main(TAppend.java:1215)
> 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:192)
> ....
> ##### Caught Exception in testReadOnly while reading.
> java.io.IOException: Exception caught in readUntilVisibleEnd: Reader
> currentOffset = 0 ; totalByteRead =0 ; latest byteRead = 0 ; visibleLen=
> 67824640 ; byteLeftToRead = 67824640 ; bufferLen = 10240000 ; chunkNumber= 0
> ; input pos = 0 ; byteToReadThisRound = 10240000 ; Filename = /tmp/N/909NF,
> ReadParam - CurrentPostion=0, offset=0, size=10240000
> at TAppend.readUntilVisibleEnd(TAppend.java:457)
> at TAppend.readUntilEnd(TAppend.java:474)
> at TAppend.testReadOnly(TAppend.java:956)
> at TAppend.main(TAppend.java:1215)
> 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:192)
> Caused by: org.apache.hadoop.hdfs.BlockMissingException: Could not obtain
> block:
> BP-1632719171-xxx.xx.xx.xxx-1303748685682:blk_-8940328094159486414_3653
> file=/tmp/N/909NF
> at
> org.apache.hadoop.hdfs.DFSInputStream.chooseDataNode(DFSInputStream.java:570)
> at
> org.apache.hadoop.hdfs.DFSInputStream.fetchBlockByteRange(DFSInputStream.java:618)
> at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
> at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:51)
> at TAppend.readUntilVisibleEnd(TAppend.java:441)
> ... 8 more
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