如果Apache Storm UI可视化窗口无法工作,可能有多种原因导致。以下是一些常见问题和解决方法的示例代码:
nimbus.seeds: ["storm-nimbus-hostname"]
nimbus.thrift.port: 6627
import org.apache.storm.generated.Nimbus;
import org.apache.storm.utils.NimbusClient;
import org.apache.storm.utils.Utils;
public class NimbusHealthCheck {
public static void main(String[] args) throws Exception {
String nimbusHost = "storm-nimbus-hostname";
int nimbusPort = 6627;
Nimbus.Client nimbusClient = NimbusClient.getConfiguredClient(Utils.readStormConfig()).getClient();
boolean isNimbusAlive = nimbusClient != null && nimbusClient.getNimbusConf() != null;
System.out.println("Nimbus service is alive: " + isNimbusAlive);
}
}
storm.zookeeper.servers:
- "zookeeper-hostname:2181"
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
public class StormLogReader {
public static void main(String[] args) throws Exception {
String stormLogDirectory = "/path/to/storm/logs";
Path logFilePath = Paths.get(stormLogDirectory, "worker.log");
if (Files.exists(logFilePath) && Files.isReadable(logFilePath)) {
try (InputStream inputStream = Files.newInputStream(logFilePath);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
}
} else {
System.out.println("Storm log file does not exist or is not readable");
}
}
}
这些示例代码可以用来诊断和解决Apache Storm UI可视化窗口无法工作的常见问题。根据具体情况,你可能需要对代码进行调整。