HDFS-11333. Print a user friendly error message when plugins are not found. Contributed by Wei-Chiu Chuang.

(cherry picked from commit 859bd159ae)
(cherry picked from commit a8531d5d52)
This commit is contained in:
Wei-Chiu Chuang 2017-02-15 02:50:35 -08:00
parent 5bb1350922
commit 4c47cb68e8
2 changed files with 18 additions and 3 deletions

View File

@ -913,7 +913,15 @@ public class DataNode extends ReconfigurableBase
}
private void startPlugins(Configuration conf) {
plugins = conf.getInstances(DFS_DATANODE_PLUGINS_KEY, ServicePlugin.class);
try {
plugins = conf.getInstances(DFS_DATANODE_PLUGINS_KEY,
ServicePlugin.class);
} catch (RuntimeException e) {
String pluginsValue = conf.get(DFS_DATANODE_PLUGINS_KEY);
LOG.error("Unable to load DataNode plugins. Specified list of plugins: " +
pluginsValue, e);
throw e;
}
for (ServicePlugin p: plugins) {
try {
p.start(this);

View File

@ -765,8 +765,15 @@ public class NameNode implements NameNodeStatusMXBean {
httpServer.setFSImage(getFSImage());
}
rpcServer.start();
plugins = conf.getInstances(DFS_NAMENODE_PLUGINS_KEY,
ServicePlugin.class);
try {
plugins = conf.getInstances(DFS_NAMENODE_PLUGINS_KEY,
ServicePlugin.class);
} catch (RuntimeException e) {
String pluginsValue = conf.get(DFS_NAMENODE_PLUGINS_KEY);
LOG.error("Unable to load NameNode plugins. Specified list of plugins: " +
pluginsValue, e);
throw e;
}
for (ServicePlugin p: plugins) {
try {
p.start(this);