如集群节点少于3个在运行时就会抛异常；解决方案修改【dfs.client.block.write.replace-datanode-on-failure.policy=NEVER】
Configuration conf = new Configuration();
conf.set("dfs.client.block.write.replace-datanode-on-failure.policy", "NEVER"); //修改属性参数
全部代码如下
public void appendByAPI() throws IOException{
Configuration conf = new Configuration();
conf.set("dfs.client.block.write.replace-datanode-on-failure.policy", "NEVER"); //修改属性参数
FileSystem fs = FileSystem.get(conf);
Path file = new Path("/spaceQuota/hello.txt");
FSDataOutputStream out = fs.append(file);
out.writeChars("aaaa");
out.close();