我已经使用Apache Drill创建了一个spring-boot maven项目，并且能够成功查询文件中的数据。当我尝试在PCF上部署该项目时，每当我的实例崩溃时，说明多个slf4j绑定。关键云流量上的Apache Drill部署
@SpringBootApplication
public class Drill {
static final String JDBC_DRIVER = "org.apache.drill.jdbc.Driver";
public static final String DRILL_JDBC_LOCAL_URI = "jdbc:drill:drillbit=xx.xx.xxx.xx;
public static void main(String[] args) throws IOException {
SpringApplication.run(Drill.class, args);
boolean result = false;
try {
result = sqlResult();
} catch (FileNotFoundException e) {
//TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(result);
}
public static boolean sqlResult() throws IOException {
try {
Class.forName(JDBC_DRIVER);
} catch (ClassNotFoundException ce) {
ce.printStackTrace();
}
long d = 1;
try {
Connection conn = DriverManager.getConnection(DRILL_JDBC_LOCAL_URI, "usrname","passwrd");
Statement stmt = conn.createStatement();
String sql = "select * from dfs.`/Users/system.user/Desktop/123.csv`";
ResultSet rs = stmt.executeQuery(sql);
long currentTimeMillis = System.currentTimeMillis();
while (rs.next()) {
System.out.println("columns: "+rs.getString(1));
d++;
}
long currentTimeMillisEnd = System.currentTimeMillis();
System.out.println(" start: "+currentTimeMillis+" end "+currentTimeMillisEnd +" size: "+d);
rs.close();
} catch (Exception se) {
System.out.println("last count is: "+d);
se.printStackTrace();
}
return false;
}
}
pom.xml:<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<org.slf4j-version>1.7.5</org.slf4j-version>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
<exclusion>
<artifactId>jcl-over-slf4j</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
<exclusion>
<artifactId>jul-to-slf4j</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.drill.exec</groupId>
<artifactId>drill-jdbc-all</artifactId>
<version>1.1.0</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
<exclusion>
<artifactId>jcl-over-slf4j</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
<exclusion>
<artifactId>jul-to-slf4j</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>0.20.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
这是错误消息我得到：
[ERR] SLF4J: Class path contains multiple SLF4J bindings.
[ERR] SLF4J: Found binding in [jar:file:/home/vcap/app/BOOT-INF/lib/drill-jdbc-all-1.1.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
[ERR] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
[ERR] SLF4J: Found binding in [jar:file:/home/vcap/app/BOOT-INF/lib/logback-classic-1.1.11.jar!/org/slf4j/impl/StaticLoggerBinder.class]
[ERR] SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
[ERR] Exception in thread "main" java.lang.reflect.InvocationTargetException
[ERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[ERR] at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
[ERR] at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
[ERR] at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
[ERR] Caused by: java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.ObjectMapper.readValue(Ljava/lang/String;Lcom/fasterxml/jackson/core/type/TypeReference;)Ljava/lang/Object;
[ERR] at org.springframework.boot.SpringApplication.run(SpringApplication.java:296)
[ERR] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
[ERR] at pack.drill.Drill.main(Drill.java:26)
我试图净提供所有可能的帮助，但我不能找出问题。我不明白为什么它在当地环境中工作得很好，为什么它甚至没有在PCF上部署。