| HBase Version | JDK 6 | JDK 7 | JDK 8 |
|---|---|---|---|
|
1.0 |
yes |
Running with JDK 8 will work but is not well tested. |
|
|
0.98 |
yes |
yes |
Running with JDK 8 works but is not well tested. Building with JDK 8 would require removal of the deprecated |
|
0.96 |
yes |
yes |
N/A |
|
0.94 |
yes |
yes |
N/A |
| HBase-0.92.x | HBase-0.94.x | HBase-0.96.x | HBase-0.98.x (Support for Hadoop 1.1+ is deprecated.) | HBase-1.0.x (Hadoop 1.x is NOT supported) | |
|---|---|---|---|---|---|
|
Hadoop-0.20.205 |
S |
X |
X |
X |
X |
|
Hadoop-0.22.x |
S |
X |
X |
X |
X |
|
Hadoop-1.0.x |
X |
X |
X |
X |
X |
|
Hadoop-1.1.x |
NT |
S |
S |
NT |
X |
|
Hadoop-0.23.x |
X |
S |
NT |
X |
X |
|
Hadoop-2.0.x-alpha |
X |
NT |
X |
X |
X |
|
Hadoop-2.1.0-beta |
X |
NT |
S |
X |
X |
|
Hadoop-2.2.0 |
X |
NT |
S |
S |
NT |
|
Hadoop-2.3.x |
X |
NT |
S |
S |
NT |
|
Hadoop-2.4.x |
X |
NT |
S |
S |
S |
|
Hadoop-2.5.x |
X |
NT |
S |
S |
S |
4.1.6.
An HDFS datanode has an upper bound on the number of files that it will serve at any one time. Before doing any loading, make sure you have configured Hadoop’s conf/hdfs-site.xml, setting thedfs.datanode.max.transfer.threads value to at least the following:
<property>
<name>dfs.datanode.max.transfer.threads</name>
<value>4096</value>
</property>Be sure to restart your HDFS after making the above configuration.