JVM異常診斷神器Greys實(shí)戰(zhàn) - 玩轉(zhuǎn)JVM

Greys是一個JVM進(jìn)程執(zhí)行過程中的異常診斷神器栈拖。在不中斷程序執(zhí)行的情況下輕松完成JVM相關(guān)問題排查工作。目前Greys僅支持Linux/Unix/Mac上的Java6+艰垂，Windows暫時無法支持。

使用場景

例如打logger埋虹，開發(fā)環(huán)境一般有五種情況：
1猜憎、異常情況，打error
2搔课、警告情況胰柑，打warm
3、非本系統(tǒng)調(diào)用入口爬泥、任務(wù)等柬讨，logger入?yún)⒑徒Y(jié)果
4、本系統(tǒng)調(diào)用袍啡，debug入?yún)⒑徒Y(jié)果
5踩官、必要信息，info一下

而在生產(chǎn)環(huán)境境输，一般不會開啟debug日志蔗牡。這時，出現(xiàn)問題如何debug嗅剖？沒錯辩越，用debug診斷神器Greys完美解決。

安裝Greys

[root@mvxl52738 tmp]# curl -sLk http://ompc.oss.aliyuncs.com/greys/install.sh|bash
# or 
[root@mvxl52738 tmp]# wget http://ompc.oss.aliyuncs.com/greys/release/greys-stable-bin.zip
[root@mvxl52738 tmp]#  unzip greys-stable-bin.zip
[root@mvxl52738 tmp]# cd greys
[root@mvxl52738 tmp]# sh ./install-local.sh

啟動關(guān)閉Greys

# ./greys.sh <PID>[@IP:PORT]
[root@mvxl52738 ]# greys.sh 57951
                                                        _                    
  ____  ____ _____ _   _  ___ _____ _____ ____  _____ _| |_ ___  ____  _   _ 
 / _  |/ ___) ___ | | | |/___|_____|____ |  _ \(____ (_   _) _ \|    \| | | |
( (_| | |   | ____| |_| |___ |     / ___ | | | / ___ | | || |_| | | | | |_| |
 \___ |_|   |_____)\__  (___/      \_____|_| |_\_____|  \__)___/|_|_|_|\__  |
(_____|           (____/                                              (____/ 
                                              +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                                              |v|e|r|s|i|o|n|:|1|.|7|.|6|.|6|
                                              +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
ga?>help
# 查看幫助文檔
ga?>shutdown
Greys Server is shut down.

遠(yuǎn)程連接Greys

遠(yuǎn)程連接信粮，當(dāng)然也是可以的黔攒。配置對應(yīng)的ip和端口，就能遠(yuǎn)程協(xié)助了强缘。

[root@mvxl52740 greys]# ./greys.sh @10.18.40.183:3658 
                                                        _                    
  ____  ____ _____ _   _  ___ _____ _____ ____  _____ _| |_ ___  ____  _   _ 
 / _  |/ ___) ___ | | | |/___|_____|____ |  _ \(____ (_   _) _ \|    \| | | |
( (_| | |   | ____| |_| |___ |     / ___ | | | / ___ | | || |_| | | | | |_| |
 \___ |_|   |_____)\__  (___/      \_____|_| |_\_____|  \__)___/|_|_|_|\__  |
(_____|           (____/                                              (____/ 
                                              +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                                              |v|e|r|s|i|o|n|:|1|.|7|.|6|.|6|
                                              +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
ga?>
ga?>tt -t -n 3 *OrderReportFacadeImpl *
Press Ctrl+D to abort.
Affect(class-cnt:1 , method-cnt:12) cost in 68 ms.
+----------+------------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
|    INDEX | PROCESS-ID |            TIMESTAMP |   COST(ms) |   IS-RET |   IS-EXP |          OBJECT |                          CLASS |                         METHOD |
+----------+------------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
|     1003 |       1003 |  2018-09-15 17:40:24 |         14 |     true |    false |       0x68d36ec |          OrderReportFacadeImpl |            lambda$selectItem$3 |
+----------+------------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
|     1004 |       1004 |  2018-09-15 17:40:24 |         15 |     true |    false |       0x68d36ec |          OrderReportFacadeImpl |                     selectItem |

常見用法

monitor命令

對匹配class-pattern／method-pattern的類.方法的調(diào)用進(jìn)行監(jiān)控督惰。

ga?>monitor -c 5  *OrderReportFacadeImpl selectItem
+---------------------+------------------------------------------------------------+------------+-------+---------+------+-----------+------------+------------+------------+
| TIMESTAMP           | CLASS                                                      | METHOD     | TOTAL | SUCCESS | FAIL | FAIL-RATE | AVG-RT(ms) | MIN-RT(ms) | MAX-RT(ms) |
+---------------------+------------------------------------------------------------+------------+-------+---------+------+-----------+------------+------------+------------+
| 2018-09-15 14:55:08 | com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl | selectItem | 1     | 1       | 0    | 00.00%    | 22.00      | 22         | 22         |
+---------------------+------------------------------------------------------------+------------+-------+---------+------+-----------+------------+------------+------------+

+---------------------+------------------------------------------------------------+------------+-------+---------+------+-----------+------------+------------+------------+
| TIMESTAMP           | CLASS                                                      | METHOD     | TOTAL | SUCCESS | FAIL | FAIL-RATE | AVG-RT(ms) | MIN-RT(ms) | MAX-RT(ms) |
+---------------------+------------------------------------------------------------+------------+-------+---------+------+-----------+------------+------------+------------+
| 2018-09-15 14:55:13 | com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl | selectItem | 3     | 3       | 0    | 00.00%    | 11.67      | 11         | 13         |
+---------------------+------------------------------------------------------------+------------+-------+---------+------+-----------+------------+------------+------------+

trace和ptrace命令

渲染和統(tǒng)計(jì)整個調(diào)用鏈路上的所有性能開銷和追蹤調(diào)用鏈路。但是旅掂，動態(tài)代理好像追不進(jìn)去姑丑。所以，Spring注入的調(diào)用追蹤不了辞友。

ga?>ptrace -t  *OrderReportFacadeImpl  *
Press Ctrl+D to abort.
Affect(class-cnt:1 , method-cnt:12) cost in 47 ms.
`---+pTracing for : thread_name="DubboServerHandler-10.18.40.183:20888-thread-21" thread_id=0x21e;is_daemon=true;priority=5;process=1003;
    `---+[36,36ms]com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl:selectLog(); index=1006;
        `---[33,17ms]com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl:lambda$selectLog$5(); index=1005;
+----------+------------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
|    INDEX | PROCESS-ID |            TIMESTAMP |   COST(ms) |   IS-RET |   IS-EXP |          OBJECT |                          CLASS |                         METHOD |
+----------+------------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
|     1005 |       1003 |  2018-09-15 15:03:54 |         16 |     true |    false |       0x68d36ec |          OrderReportFacadeImpl |             lambda$selectLog$5 |
+----------+------------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+
|     1006 |       1003 |  2018-09-15 15:03:54 |         20 |     true |    false |       0x68d36ec |          OrderReportFacadeImpl |                      selectLog |
+----------+------------+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+

tt命令（重點(diǎn)掌握）

時間隧道命令記

# ga?>tt Press Ctrl+D to abort. Affect(class-cnt:1 +----------+------- |    INDEX | PROCESS-ID | +----------+------- |     1008 | +----------+------- |     1009 |

ga?>tt -l +----------+------- |    INDEX | PROCESS-ID | +----------+------- |     1001 | +----------+------- |     1002 | +----------+------- |     1003 | +----------+------- |     1004 | +----------+------- |     1005 | +----------+------- |     1006 | +----------+------- |     1007 | +----------+------- |     1008 | +----------+------- |     1009 | +----------+-------

# 查看調(diào)用信息 ga?>tt -i 1006 -x 3

# 查看異常信息 ga?>tt -i 1008 -x 3 +-----------------+ |           INDEX | 1008 +-----------------+ |      PROCESS-ID | 1005 +-----------------+ |      GMT-CREATE +-----------------+ |        COST(ms) | 189 +-----------------+ |          OBJECT | 0x68d36ec +-----------------+ | +-----------------+ | +-----------------+ |       IS-RETURN | false +-----------------+ |    IS-EXCEPTION | true +-----------------+ |   PARAMETERS[0] | | +-----------------+ |   PARAMETERS[1] | 0 +-----------------+ |   PARAMETERS[2] | 10 +-----------------+ |   PARAMETERS[3] +-----------------+ | THROW-EXCEPTION | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-----------------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-----------------+

# 重跑一次。 # 當(dāng)你少少 # tt命令由于保 ga?>tt -i 1006 -p

watch命令（tt命令已經(jīng)包含了它）

能方便的讓你錄下當(dāng)時方法調(diào)用的所有入?yún)⒑头祷刂怠伋龅漠惓?/p> 記錄下當(dāng)前方法的每次調(diào)用環(huán)境現(xiàn)場 -t -n 3 *OrderReportFacadeImpl * , method-cnt:12) cost in 70 ms. -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1005 | 2018-09-15 16:49:28 | 189 | false | true | 0x68d36ec | OrderReportFacadeImpl | lambda$selectItem$3 | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1006 | 2018-09-15 16:49:28 | 192 | true | false | 0x68d36ec | OrderReportFacadeImpl | selectItem | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ TIMESTAMP | COST(ms) | IS-RET | IS-EXP | OBJECT | CLASS | METHOD | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1001 | 2018-09-15 15:02:10 | 15 | true | false | 0x68d36ec | OrderReportFacadeImpl | lambda$selectItem$3 | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1001 | 2018-09-15 15:02:10 | 17 | true | false | 0x68d36ec | OrderReportFacadeImpl | selectItem | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1002 | 2018-09-15 15:02:46 | 13 | true | false | 0x68d36ec | OrderReportFacadeImpl | lambda$selectItem$3 | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1002 | 2018-09-15 15:02:46 | 14 | true | false | 0x68d36ec | OrderReportFacadeImpl | selectItem | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1003 | 2018-09-15 15:03:54 | 16 | true | false | 0x68d36ec | OrderReportFacadeImpl | lambda$selectLog$5 | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1003 | 2018-09-15 15:03:54 | 20 | true | false | 0x68d36ec | OrderReportFacadeImpl | selectLog | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1004 | 2018-09-15 16:44:45 | 14 | true | false | 0x68d36ec | OrderReportFacadeImpl | sendItem2SAP | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1005 | 2018-09-15 16:49:28 | 189 | false | true | 0x68d36ec | OrderReportFacadeImpl | lambda$selectItem$3 | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ 1006 | 2018-09-15 16:49:28 | 192 | true | false | 0x68d36ec | OrderReportFacadeImpl | selectItem | -----+----------------------+------------+----------+----------+-----------------+--------------------------------+--------------------------------+ --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | 2018-09-15 16:49:28 | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ CLASS | com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl | --------------------------------------------------------------------------------------------------------------------------------------------------------+ METHOD | lambda$selectItem$3 | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | OrderReportRequest(reportId=null, reportIdList=null, orderSubId=null, orderId=null, shopIdList=[1], startTime=Mon Sep 03 16:49:15 CST 2018, endTime=Sa | | t Sep 15 16:49:20 CST 2018, clientIdList=null, skuTypeList=null, packingId=null, companyCodeList=null, salesTypeList=[], statusList=[], applyId=null, | | exceptionType=0) | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | CommonResponse(result=null) | --------------------------------------------------------------------------------------------------------------------------------------------------------+ | org.springframework.jdbc.BadSqlGrammarException: | | ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'shop_id' in 'where clause' | | ### The error may exist in file [/apps/zoomlion/ecu-fc-sales/tomcat-9008/webapps/fc-sales/WEB-INF/classes/sqlmaps/fcsqlmaps/custom/CustomOrderReportMa | | pper.xml] | | ### The error may involve com.meicloud.ecu.fc.impl.model.dao.fc.custom.CustomOrderReportMapper.selectByEntity-Inline | | ### The error occurred while setting parameters | | ### SQL: SELECT count(*) FROM f_order_report AS item LEFT OUTER JOIN f_order_report_extend AS extend ON (item.report_id = extend.report_id) WHERE (( | | (1 = 1) AND (shop_id IN ( ? ))) AND (consign_time >= ( ? ))) AND (consign_time < ( ? )) | | ### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'shop_id' in 'where clause' | | ; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'shop_id' in 'where clause' | | at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:237) | | at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72) | | at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73) | | at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371) | | at com.sun.proxy.$Proxy22.selectList(Unknown Source) | | at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:198) | | at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:119) | | at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63) | | at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52) | | at com.sun.proxy.$Proxy23.selectByEntity(Unknown Source) | | at com.meicloud.ecu.fc.impl.service.impl.OrderReportServiceImpl.selectItem(OrderReportServiceImpl.java:224) | | at com.meicloud.ecu.fc.impl.service.impl.OrderReportServiceImpl$$FastClassBySpringCGLIB$$60343937.invoke(<generated>) | | at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) | | at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:629) | | at com.meicloud.ecu.fc.impl.service.impl.OrderReportServiceImpl$$EnhancerBySpringCGLIB$$9a3e9305.selectItem(<generated>) | | at com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl.lambda$selectItem$3(OrderReportFacadeImpl.java:122) | | at com.meicloud.ecu.fc.impl.utils.RespPackUtil.execInvokeService(RespPackUtil.java:31) | | at com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl.selectItem(OrderReportFacadeImpl.java:121) | | at com.alibaba.dubbo.common.bytecode.Wrapper4.invokeMethod(Wrapper4.java) | | at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46) | | at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72) | | at com.alibaba.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:36) | | at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53) | | at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:61) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:132) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:98) | | at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:98) | | at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:170) | | at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52) | | at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:81) | | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) | | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) | | at java.lang.Thread.run(Thread.java:748) | | Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'shop_id' in 'where clause' | | 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 com.mysql.jdbc.Util.handleNewInstance(Util.java:409) | | at com.mysql.jdbc.Util.getInstance(Util.java:384) | | at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052) | | at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4232) | | at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4164) | | at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615) | | at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776) | | at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2838) | | at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2082) | | at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1307) | | at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source) | | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | | at java.lang.reflect.Method.invoke(Method.java:498) | | at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:62) | | at com.sun.proxy.$Proxy59.execute(Unknown Source) | | at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:59) | | at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:73) | | at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:60) | | at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267) | | at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137) | | at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96) | | at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77) | | at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source) | | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | | at java.lang.reflect.Method.invoke(Method.java:498) | | at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49) | | at com.github.pagehelper.PageHelper.intercept(PageHelper.java:211) | | at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:60) | | at com.sun.proxy.$Proxy56.query(Unknown Source) | | at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108) | | at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102) | | at sun.reflect.GeneratedMethodAccessor163.invoke(Unknown Source) | | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | | at java.lang.reflect.Method.invoke(Method.java:498) | | at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358) | | ... 43 more | --------------------------------------------------------------------------------------------------------------------------------------------------------+ STACK | thread_name="DubboServerHandler-10.18.40.183:20888-thread-39" thread_id=0x239;is_daemon=true;priority=5; | | @com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl.lambda$selectItem$3(OrderReportFacadeImpl.java:124) | | at com.meicloud.ecu.fc.impl.utils.RespPackUtil.execInvokeService(RespPackUtil.java:31) | | at com.meicloud.ecu.fc.impl.facade.impl.OrderReportFacadeImpl.selectItem(OrderReportFacadeImpl.java:121) | | at com.alibaba.dubbo.common.bytecode.Wrapper4.invokeMethod(Wrapper4.java:-1) | | at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46) | | at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72) | | at com.alibaba.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:36) | | at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53) | | at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:61) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:132) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38) | | at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:69) | | at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:98) | | at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:98) | | at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:170) | | at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52) | | at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:81) | | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) | | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) | | at java.lang.Thread.run(Thread.java:748) | --------------------------------------------------------------------------------------------------------------------------------------------------------+ 做了一些調(diào)整之后称龙，你可能需要前端系統(tǒng)重新觸發(fā)一次你的調(diào)用留拾，此時得求爺爺告奶奶的需要前端配合聯(lián)調(diào)的同學(xué)再次發(fā)起一次調(diào)用。而有些場景下鲫尊，這個調(diào)用不是這么好觸發(fā)的痴柔。存了當(dāng)時調(diào)用的所有現(xiàn)場信息，所以我們可以自己主動對一個INDEX編號的時間片自主發(fā)起一次調(diào)用疫向，從而解放你的溝通成本咳蔚。此時你需要-p參數(shù)。觀察到指定方法的調(diào)用情況搔驼。能觀察到的范圍為：返回值谈火、拋出異常、入?yún)⑸嗾牵ㄟ^編寫OGNL表達(dá)式進(jìn)行對應(yīng)變量的查看糯耍。

表達(dá)式核心變量

public class Advice {

    // 本次調(diào)用類所在的ClassLoader 
    private final ClassLoader loader; 
    // 本次調(diào)用類的Class引用
    private final Class<?> clazz;
    // 本次調(diào)用方法反射引用
    private final GaMethod method;
    // 本次調(diào)用類的實(shí)例
    private final Object target;
    // 本次調(diào)用參數(shù)列表，這是一個數(shù)組囊嘉，如果方法是無參方法則為空數(shù)組
    private final Object[] params;
    // 本次調(diào)用返回的對象温技。當(dāng)且僅當(dāng)isReturn==true成立時候有效，
    // 表明方法調(diào)用是以正常返回的方式結(jié)束扭粱。
    // 如果當(dāng)前方法無返回值void舵鳞，則值為null
    private final Object returnObj;
    // 本次調(diào)用拋出的異常。當(dāng)且僅當(dāng)isThrow==true成立時有效琢蛤，
    // 表明方法調(diào)用是以拋出異常的方式結(jié)束蜓堕。
    private final Throwable throwExp;
    private final boolean isBefore;
    private final boolean isThrow;
    private final boolean isReturn;

    // getter/setter  
}

stack命令（tt命令已經(jīng)包含了它）

很多時候我們都知道一個方法被執(zhí)行，但這個方法被執(zhí)行的路徑非常多虐块×├模或者你根本就不知道這個方法是從那里被執(zhí)行了，正在郁悶贺奠，正在彷徨霜旧。此時你需要的是stack命令。

詳情參考：https://github.com/oldmanpushcart/greys-anatomy

最后編輯于：2018.09.16 04:38:15

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