Some service configurations are not configured properly. We recommend you review and change the highlighted configuration values. Are you sure you want to proceed without correcting configurations?

Type
Service
Property
Value
Description

Warning
HDFS
dfs.datanode.du.reserved
1073741824
Value is less than the recommended default of 5772135936
Reserved space in bytes per volume. Always leave this much space free for non dfs use.
Warning
HDFS
namenode_heapsize
250
Value is less than the recommended default of 1024
NameNode Java heap size
Warning
HDFS
namenode_opt_maxnewsize
100
Value is less than the recommended default of 128
NameNode maximum new generation size
Warning
HDFS
namenode_opt_newsize
50
Value is less than the recommended default of 128
Default size of Java new generation for NameNode (Java option -XX:NewSize) Note: The value of NameNode new generation size (default size of Java new generation for NameNode (Java option -XX:NewSize)) should be 1/8 of maximum heap size (-Xmx). Ensure that the value of the namenode_opt_newsize property is 1/8 the value of maximum heap size (-Xmx).
Warning
MapReduce2
mapreduce.map.java.opts
-Xmx200m
Value is less than the recommended default of -Xmx1228m
Larger heap-size for child jvms of maps.
Warning
MapReduce2
mapreduce.map.memory.mb
250
Value is less than the recommended minimum of 512
Value is less than the recommended default of 1536
Virtual memory for single Map task
Warning
MapReduce2
mapreduce.reduce.java.opts
-Xmx200m
Value is less than the recommended default of -Xmx1228m
Larger heap-size for child jvms of reduces.
Warning
MapReduce2
mapreduce.reduce.memory.mb
250
Value is less than the recommended default of 1536
Value is less than the recommended minimum of 512
Virtual memory for single Reduce task
Warning
MapReduce2
mapreduce.task.io.sort.mb
64
Value is less than the recommended default of 859
The total amount of buffer memory to use while sorting files, in megabytes. By default, gives each merge stream 1MB, which should minimize seeks.
Warning
MapReduce2
yarn.app.mapreduce.am.command-opts
-Xmx200m
Value is less than the recommended default of -Xmx409m
Java opts for the MR App Master processes. The following symbol, if present, will be interpolated: @taskid@ is replaced by current TaskID. Any other occurrences of '@' will go unchanged. For example, to enable verbose gc logging to a file named for the taskid in /tmp and to set the heap maximum to be a gigabyte, pass a 'value' of: -Xmx1024m -verbose:gc -Xloggc:/tmp/@taskid@.gc Usage of -Djava.library.path can cause programs to no longer function if hadoop native libraries are used. These values should instead be set as part of LD_LIBRARY_PATH in the map / reduce JVM env using the mapreduce.map.env and mapreduce.reduce.env config settings.
Warning
MapReduce2
yarn.app.mapreduce.am.resource.mb
250
Value is less than the recommended minimum of 512
Value is less than the recommended default of 512
The amount of memory the MR AppMaster needs.
Warning
Tez
tez.am.resource.memory.mb
256
Value is less than the recommended default of 1024
The amount of memory to be used by the AppMaster. Used only if the value is not specified explicitly by the DAG definition.
Warning
Tez
tez.task.resource.memory.mb
256
Value is less than the recommended default of 512
The amount of memory to be used by launched tasks. Used only if the value is not specified explicitly by the DAG definition.
Warning
Hive
hive.auto.convert.join.noconditionaltask.size
3149642683
Value is greater than the recommended maximum of 429496729
If hive.auto.convert.join.noconditionaltask is off, this parameter does not take affect. However, if it is on, and the sum of size for n-1 of the tables/partitions for a n-way join is smaller than this size, the join is directly converted to a mapjoin(there is no conditional task).
Warning
Hive
hive.heapsize
96628
Value is greater than the recommended maximum of 7823
Hive Java heap size
Warning
Hive
hive.metastore.heapsize
32209
Value is greater than the recommended maximum of 7823
Hive Metastore Java heap size
Warning
Hive
hive.tez.container.size
250
Value is less than the recommended default of 512
By default, Tez uses the java options from map tasks. Use this property to override that value.
Warning
Ambari Metrics
hbase.rootdir
file:///var/lib/ambari-metrics-collector/hbase
It is not recommended to use root partition for hbase.rootdir
Ambari Metrics service uses HBase as default storage backend. Set the rootdir for HBase to either local filesystem path if using Ambari Metrics in embedded mode or to a HDFS dir, example: hdfs://namenode.example.org:8020/amshbase.
Warning
Ambari Metrics
hbase.tmp.dir
/var/lib/ambari-metrics-collector/hbase-tmp
Consider not using / partition for storing metrics temporary data. / partition is already used as hbase.rootdir to store metrics data
Temporary directory on the local filesystem. Change this setting to point to a location more permanent than '/tmp' (The '/tmp' directory is often cleared on machine restart).
Warning
Atlas
atlas.graph.storage.hostname
sandbox.hortonworks.com
Atlas is configured to use the HBase installed in this cluster. If you would like Atlas to use another HBase instance, please configure this property and HBASE_CONF_DIR variable in atlas-env appropriately.