在
Phoenix客户端使用自定义函数UDF时候是正常的,但是在本地测试的时候报Function类找不到的异常。
异常演示
例子
@Test
public void testSql2() throws SQLException {
String sql = "select CRC32(\"userId\") from TEST_LOG";
Configuration conf = new Configuration();
conf.addResource("hbase-site.xml");//BUG修改处
conf.addResource("hdfs-site.xml");
PhoenixDriver phoenixDriver = PhoenixDriver.getInstaceWithProperties(conf,PhoenixDriver.loadProperties());
ResultSet rs = phoenixDriver.query(sql);
int columns=rs.getMetaData().getColumnCount();
while(rs.next()) {
for(int i=1;i<=columns;i++) {
System.out.print(rs.getString(i));
System.out.print("\t\t");
}
System.out.println();
}
}
CRC32Function.java
@BuiltInFunction(name = CRC32Function.NAME, args = {@Argument()})
public class CRC32Function extends ScalarFunction {
public static final String NAME = "CRC32";
public static final Integer LENGTH = 19;
public CRC32Function() throws SQLException {
}
public CRC32Function(List<Expression> children) throws SQLException {
super(children);
}
public static void main(String[] args) {
CRC32 crc32 = new CRC32();
crc32.update("lake".getBytes());
System.out.println(crc32.getValue());
}
@Override
public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) {
if (!getChildExpression().evaluate(tuple, ptr)) {
return false;
}
if (ptr.getLength() == 0) {
return true;
}
CRC32 crc32 = new CRC32();
crc32.update(ptr.get(),ptr.getOffset(), ptr.getLength());
ptr.set(Bytes.toBytes(String.valueOf(crc32.getValue())));
return true;
}
@Override
public PDataType getDataType() {
return PVarchar.INSTANCE;
}
@Override
public Integer getMaxLength() {
return LENGTH;
}
@Override
public boolean isNullable() {
return getChildExpression().isNullable();
}
@Override
public String getName() {
return NAME;
}
private Expression getChildExpression() {
return children.get(0);
}
}
导入phoenix-core 编译打包上传至HDFS中
hadoop fs -put phoenix-udfs-1.0-SNAPSHOT.jar /hbase/lib/
在Phoenix命令中创建函数
create function CRC32(varchar) returns varchar as 'com.dounine.phoenixudfs.CRC32Function' using jar 'hdfs:///hbase/lib/phoenix-udfs-1.0-SNAPSHOT.jar'
我们在Phoenix客户端查询Function表是有数据的
jdbc:phoenix:host1.demo.com:2181> select * from SYSTEM."FUNCTION";
+------------+----------------+-----------+------------------------------------------+--------------------------------------------------+--------+
| TENANT_ID | FUNCTION_NAME | NUM_ARGS | CLASS_NAME | JAR_PATH | RETURN |
+------------+----------------+-----------+------------------------------------------+--------------------------------------------------+--------+
| | CRC32 | 1 | com.dounine.phoenixudfs.CRC32Function | hdfs:///hbase/lib/phoenix-udfs-1.0-SNAPSHOT.jar | varcha |
| | CRC32 | null | | | |
+------------+----------------+-----------+------------------------------------------+--------------------------------------------------+--------+
4 rows selected (0.068 seconds)
jar包查看
jdbc:phoenix:storm2.starsriver.cn:2181> list jars;
+---------------------------------------------------------------------------+
| jar_location |
+---------------------------------------------------------------------------+
| hdfs://host5.demo.com:8020/hbase/lib/phoenix-udfs-1.0-SNAPSHOT.jar |
+---------------------------------------------------------------------------+
1 row selected (0.645 seconds)
程序异常如下
java.sql.SQLException: java.lang.reflect.InvocationTargetException
at org.apache.phoenix.parse.FunctionParseNode.create(FunctionParseNode.java:280)
at org.apache.phoenix.compile.ExpressionCompiler.visitLeave(ExpressionCompiler.java:336)
at org.apache.phoenix.compile.ProjectionCompiler$SelectClauseVisitor.visitLeave(ProjectionCompiler.java:700)
at org.apache.phoenix.compile.ProjectionCompiler$SelectClauseVisitor.visitLeave(ProjectionCompiler.java:585)
at org.apache.phoenix.parse.FunctionParseNode.accept(FunctionParseNode.java:86)
at org.apache.phoenix.compile.ProjectionCompiler.compile(ProjectionCompiler.java:412)
at org.apache.phoenix.compile.QueryCompiler.compileSingleFlatQuery(QueryCompiler.java:561)
at org.apache.phoenix.compile.QueryCompiler.compileSingleQuery(QueryCompiler.java:507)
at org.apache.phoenix.compile.QueryCompiler.compileSelect(QueryCompiler.java:193)
at org.apache.phoenix.compile.QueryCompiler.compile(QueryCompiler.java:153)
at org.apache.phoenix.jdbc.PhoenixStatement$ExecutableSelectStatement.compilePlan(PhoenixStatement.java:490)
at org.apache.phoenix.jdbc.PhoenixStatement$ExecutableSelectStatement.compilePlan(PhoenixStatement.java:456)
at org.apache.phoenix.jdbc.PhoenixStatement$1.call(PhoenixStatement.java:302)
at org.apache.phoenix.jdbc.PhoenixStatement$1.call(PhoenixStatement.java:291)
at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53)
at org.apache.phoenix.jdbc.PhoenixStatement.executeQuery(PhoenixStatement.java:290)
at org.apache.phoenix.jdbc.PhoenixStatement.executeQuery(PhoenixStatement.java:283)
at org.apache.phoenix.jdbc.PhoenixStatement.executeQuery(PhoenixStatement.java:1793)
at cn.starsriver.flink.phoenix.PhoenixDriver.query(PhoenixDriver.java:96)
at com.dounine.test.PhoenixTest1.testSql2(PhoenixTest1.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.phoenix.parse.FunctionParseNode.create(FunctionParseNode.java:268)
... 41 more
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: com.dounine.phoenixudfs.CRC32Function
at org.apache.phoenix.expression.function.UDFExpression.constructUDFFunction(UDFExpression.java:170)
at org.apache.phoenix.expression.function.UDFExpression.<init>(UDFExpression.java:72)
... 46 more
Caused by: java.lang.ClassNotFoundException: cn.starsriver.phoenixudfs.CRC32Function
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at org.apache.hadoop.hbase.util.DynamicClassLoader.tryRefreshClass(DynamicClassLoader.java:173)
at org.apache.hadoop.hbase.util.DynamicClassLoader.loadClass(DynamicClassLoader.java:140)
at org.apache.phoenix.expression.function.UDFExpression.constructUDFFunction(UDFExpression.java:164)
... 47 more
一切看起来都是正常的，那怎么会出现这种错误呢?
原因就出在配置上，默认动态加载的jar包会复制一份到hbase.local.dir目录下,动态加载的jar也是默认从这个配置的目录中加载的，所以只要把这个目录配置正确即可。
解决方案
修改程序的hbase-site.xml中的hbase.local.dir为UDFjar包所在目录即可
<property>
<name>hbase.local.dir</name>
<value>/tmp/hbase-hbase/local</value>
</property>
目录下面有编译好的UDF包
[root@dounine bin]# ls /tmp/hbase-hbase/local/jars/
phoenix-udfs-1.0-SNAPSHOT.jar
