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我被困在使用UDF jar中。我需要在我的UDF中解析簡單的UserAgent。我發現了一個流行的UserAgent解析器http://www.bitwalker.eu/software/user-agent-utils，它包含在我的項目中。在項目中我使用maven。我添加了所有的依賴關係，實現了eveyrthing並對其進行測試。它在我的本地機器上正常工作。接下來，我會在用於構建jar的maven中進行乾淨安裝。我通過添加jar {MyJarName}在Hive中使用這個jar，然後創建一個函數：創建臨時函數{functionName}爲{pathToUDFClass}，並得到像這樣的異常。Hive UDF引發類未找到異常在選擇
Caused by: java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"bidid":"8326c0ec49e5746f1af03400f37e5797","tstamp":20131022185001163,"logtype":1
,"ipinyouid":"D89E8S5bwWz","useragent":"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; InfoPath.2)","ip":"61.138.253.*","regionid":374,"cityid":375,"adexchange":1
,"domain":"449a7568331085d43d5867de26ce1ee1","url":"5ecba5b62bafd3428cdc1398b40cf88f","anonymousurl":"null","adslotid":null,"adslotwidth":300,"adslotheight":250,"adslotvisibility":"Na","adslotformat":"Na","adslo
tfloorprice":0,"creativeid":"10722","biddingprice":294,"payingprice":135,"landingpageurl":"null","advertiserid":2821,"userprofileids":[10006,10110,10063]}
at org.apache.hadoop.hive.ql.exec.tez.MapRecordSource.processRow(MapRecordSource.java:91)
at org.apache.hadoop.hive.ql.exec.tez.MapRecordSource.pushRecord(MapRecordSource.java:68)
at org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.run(MapRecordProcessor.java:325)
at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:150)
... 14 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"bidid":"8326c0ec49e5746f1af03400f37e5797","tstamp":20131022185001163,"logtype":1,"ipinyouid":"D89E8S5bwWz","
useragent":"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; InfoPath.2)","ip":"61.138.253.*","regionid":374,"cityid":375,"adexchange":1,"domain":"449a7568331085d43
d5867de26ce1ee1","url":"5ecba5b62bafd3428cdc1398b40cf88f","anonymousurl":"null","adslotid":null,"adslotwidth":300,"adslotheight":250,"adslotvisibility":"Na","adslotformat":"Na","adslotfloorprice":0,"creativeid":
"10722","biddingprice":294,"payingprice":135,"landingpageurl":"null","advertiserid":2821,"userprofileids":[10006,10110,10063]}
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:565)
at org.apache.hadoop.hive.ql.exec.tez.MapRecordSource.processRow(MapRecordSource.java:83)
... 17 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute method public org.apache.hadoop.io.Text hive.homework3.UserAgentDetector.evaluate(org.apache.hadoop.io.Text) on object hive.homewor
[email protected] of class hive.homework3.UserAgentDetector with arguments {Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; InfoPath.2):org.apache.hadoo
p.io.Text} of size 1
at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:1019)
at org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge.evaluate(GenericUDFBridge.java:182)
at org.apache.hadoop.hive.ql.exec.ExprNodeGenericFuncEvaluator._evaluate(ExprNodeGenericFuncEvaluator.java:186)
at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:77)
at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:65)
at org.apache.hadoop.hive.ql.exec.SelectOperator.process(SelectOperator.java:81)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:841)
at org.apache.hadoop.hive.ql.exec.TableScanOperator.process(TableScanOperator.java:133)
at org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.forward(MapOperator.java:170)
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:555)
... 18 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:995)
... 27 more
Caused by: java.lang.NoClassDefFoundError: eu/bitwalker/useragentutils/UserAgent
at hive.homework3.UserAgentDetector.formatter(UserAgentDetector.java:30)
at hive.homework3.UserAgentDetector.evaluate(UserAgentDetector.java:22)
... 32 more
Caused by: java.lang.ClassNotFoundException: eu.bitwalker.useragentutils.UserAgent
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 34 more
]], Vertex did not succeed due to OWN_TASK_FAILURE, failedTasks:1 killedTasks:21, Vertex vertex_1501829365845_0009_1_00 [Map 1] killed/failed due to:OWN_TASK_FAILURE]DAG did not succeed due to VERTEX_FAILURE. fa
iledVertices:1 killedVertices:0
，因爲我明白，最重要的是：
Caused by: java.lang.ClassNotFoundException: eu.bitwalker.useragentutils.UserAgent
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 34 more
我在Maven項目使用外部庫。
這是UDF創建，順便在本地工作中，一切正常，並通過測試。但是在Hive中它不起作用。我想這個我使用的lib有問題，但是如果我在本地工作正常可以嗎？
import eu.bitwalker.useragentutils.UserAgent;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.io.Text;
@Description(
name = "agentdetector",
value = "_FUNC_(str) - detects a user-agent of user",
extended = "Example:\n" +
" > SELECT agent(line) FROM test ipy; \n"
)
public class UserAgentDetector extends UDF {
public Text evaluate(Text text) {
Text value = new Text("");
if (text != null) {
value.set(formatter(text));
return value;
} else {
return null;
}
}
private Text formatter(Text text) {
UserAgent userAgent = UserAgent.parseUserAgentString(text.toString());
StringBuilder builder = new StringBuilder();
builder.append("Browser : ").append(userAgent.getBrowser().getName()).append("\n");
text.set(builder.toString());
return text;
}
而且對Maven的依賴是：
<dependency>
<groupId>eu.bitwalker</groupId>
<artifactId>UserAgentUtils</artifactId>
<version>1.20</version>
</dependency>