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https://issues.apache.org/jira/browse/HDFS-6953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14116579#comment-14116579
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Vladislav Falfushinsky commented on HDFS-6953:
----------------------------------------------
The issue can be closed. When running C++ application it is needed to set
CLASSPATH variable in unix environment that will contain HADOOP_CONF_DIR and
all jar`s from HADOOP.
> HDFS file append failing in single node configuration
> -----------------------------------------------------
>
> Key: HDFS-6953
> URL: https://issues.apache.org/jira/browse/HDFS-6953
> Project: Hadoop HDFS
> Issue Type: Bug
> Environment: Ubuntu 12.01, Apache Hadoop 2.5.0 single node
> configuration
> Reporter: Vladislav Falfushinsky
> Attachments: Main.java, core-site.xml, hdfs-site.xml, test_hdfs.c
>
>
> The following issue happens in both fully distributed and single node setup.
> I have looked to the thread(https://issues.apache.org/jira/browse/HDFS-4600)
> about simiral issue in multinode cluster and made some changes of my
> configuration however it does not changed anything. The configuration files
> and application sources are attached.
> Steps to reproduce:
> $ ./test_hdfs
> 2014-08-27 14:23:08,472 WARN [Thread-5] hdfs.DFSClient
> (DFSOutputStream.java:run(628)) - DataStreamer Exception
> java.io.IOException: Failed to replace a bad datanode on the existing
> pipeline due to no more good datanodes being available to try. (Nodes:
> current=[127.0.0.1:50010], original=[127.0.0.1:50010]). The current failed
> datanode replacement policy is DEFAULT, and a client may configure this via
> 'dfs.client.block.write.replace-datanode-on-failure.policy' in its
> configuration.
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.findNewDatanode(DFSOutputStream.java:969)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1035)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1184)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:532)
> FSDataOutputStream#close error:
> java.io.IOException: Failed to replace a bad datanode on the existing
> pipeline due to no more good datanodes being available to try. (Nodes:
> current=[127.0.0.1:50010], original=[127.0.0.1:50010]). The current failed
> datanode replacement policy is DEFAULT, and a client may configure this via
> 'dfs.client.block.write.replace-datanode-on-failure.policy' in its
> configuration.
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.findNewDatanode(DFSOutputStream.java:969)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1035)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1184)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:532)
> I have tried to run a simple example in java, that uses append function. It
> failed too.
> I have tried to get hadoop environment settings from java application. It has
> shown the default ones. Not the settings that ones that are mentioned in
> core-site.xml and hdfs-site.xml files.
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