是否可以让java使用命令行的环境而不是自己的环境?
我有一个用
调用bash脚本的java程序final ProcessBuilder pb = new ProcessBuilder("bash", "-x", exportScriptLoc, platformId, oldWorkFlowId,
newWorkFlowId).inheritIO();
pb.directory(new File("/opt/nis/ddziak-dev/nis-hadoop"));
final Process p = pb.start();
p.waitFor();
final int exitValue = p.exitValue();
p.destroy();
if (exitValue == 0) {
当我在命令行上执行脚本时,它的行为符合预期。当我的java程序执行脚本时,它会产生以下异常:
Exception in thread "main" java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient
at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:347)
at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:681)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:625)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient
at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1422)
at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:62)
at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:72)
at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2457)
at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2469)
at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:341)
... 7 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1420)
... 12 more
Caused by: java.lang.NoSuchFieldError: SASL_PROPS
at org.apache.hadoop.hive.thrift.HadoopThriftAuthBridge20S.getHadoopSaslProperties(HadoopThriftAuthBridge20S.java:127)
at org.apache.hadoop.hive.metastore.MetaStoreUtils.getMetaStoreSaslProperties(MetaStoreUtils.java:1485)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.open(HiveMetaStoreClient.java:322)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:214)
... 17 more
脚本如下
#!/bin/bash
. ~/.bash_profile
export HIVE_HOME=/usr/lib/hive
#export PATH=$PATH:$HIVE_HOME/bin
env
echo "hive -S -e \"show partitions nis.subscribers
partition(destinationPlatformId='$1', build='$2');\"|awk '{if(NR>1)print}'" >> subscribers.out
PARTITIONS=`/usr/bin/hive -S -e "show partitions nis.subscribers
partition(destinationPlatformId='$1', build='$2');"|awk '{if(NR>1)print}'`
echo "${PARTITIONS}"
if [ -z "$PARTITIONS" ]
then
exit 2
fi
echo "${PARTITIONS}"
hqlOut=`/usr/bin/hive -S -hiveconf destPlatId=$1 -hiveconf newWorkFlowId=$3 -hiveconf oldWorkFlowId=$2 -f /opt/nis/ddziak-dev/nis-
hadoop/dapLib/updateSubscriberHiveTable.hql`
newPARTITIONS=`/usr/bin/hive -S -e "show partitions nis.subscribers partition(destinationPlatformId='$1');"|awk '{if(NR>1)print}'`
if [ -z "$newPARTITIONS" ]
then
exit 3
fi
答案 0 :(得分:1)
是否可以让java使用命令行的环境而不是自己的环境?
这取决于“命令行环境”的含义。如果你的意思是狭义上从变量名到值的映射,那么
启动VM的java
命令从启动它的命令获取其环境。更有可能的是“命令行的环境”。
除非您采取行动产生不同的效果(并且所呈现的代码没有),您在ProcessBuilder
的帮助下启动的流程将继承VM环境的副本。
但我认为你正在咆哮错误的树。虽然可以想象环境问题可能间接地促成java.lang.NoSuchFieldError
,但Error
是
如果应用程序尝试访问或修改指定字段,则抛出该异常 一个对象,并且该对象不再具有该字段。
通常,编译器会捕获此错误;这个错误只能 如果类的定义不兼容,则在运行时发生 改变。
(API docs)
这表明错误的近端原因是您的运行时类路径中的类不匹配。此上下文中的 Field 表示类的成员变量,因此Java正在寻找SASL_PROPS
(尽管我不清楚哪个类应该具有该字段)。< / p>