5.5. Known Issues for Ambari

Ambari does not support running or installing stacks on Unbuntu.

The component version information displayed by Ambari is based on the Ambari Stack definition. If you have applied patches to the Stack and to your software repository, that component version might differ from the actual version installed. There is no functional impact on Ambari if the patch versions mismatch. If you have any questions on component versions, refer to the rpm version installed on the actual host.

BUG-12111: Missing LzoCodec settings in core-site.xml file

Problem: After cluster install, the io.compression.codecs property in $HADOOP_CONF_DIR/core-site.xml was incorrect. It displays as:

<property>
    <name>io.compression.codecs</name>
    <value>org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.DefaultCodec</value>
 </property>

Workaround: Use Ambari Web to modify the io.compression.codecs property. Select Services > HDFS > Configs > Advanced and modify to:

<property>
    <name>io.compression.codecs</name>
    <value>org.apache.hadoop.io.compress.GzipCodec,com.hadoop.compression.lzo.LzoCodec,org.apache.hadoop.io.compress.DefaultCodec</value>
 </property>

And add the io.compression.codec.lzo.class property to the Custom core-site.xml section:

<property>
    <name>io.compression.codec.lzo.class</name>
    <value>com.hadoop.compression.lzo.LzoCodec</value>
</property>