java.io.IOException: ExceptionTarget host must not be null

解决Java IO异常：ExceptionTargethostmustnotbenull
最新推荐文章于 2021-09-29 13:38:51 发布
原创 最新推荐文章于 2021-09-29 13:38:51 发布 · 1.3k 阅读 · 0 ·
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#IOException

java.io.IOException: ExceptionTarget host must not be null

报错的原因是因为没有在加url中加“http://”，加上http://就是解决方案。

解决Target host must not be null, or set in parameters.
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以下是在get方式中遇到，把每个参数采用utf-8编码即可 // 这样写是错误的，后面不能一次整体编码 // sb.append("http://abc.com/api?") // append("body=").append(body).append("&ids=").append(JSONArray.toJSONString(id
RSA加密内容过长导致抛异常javax.crypto.IllegalBlockSizeException: Data must not be longer than 117 bytes
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Caused by: java.io.IOException: Target host must not be null, or set in parameters. scheme=null
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[root@yfw ~]# cd /opt/openfire [root@yfw openfire]# sudo -u openfire tee /opt/openfire/conf/openfire.xml > /dev/null << 'EOF' > <?xml version="1.0" encoding="UTF-8"?> > <jive> > <adminConsole> > <port>9090</port> > <securePort>9091</securePort> > </adminConsole> > <locale>en_US</locale> > <setup>true</setup> <!-- 关键：强制进入安装模式 --> > </jive> > EOF [root@yfw openfire]# [root@yfw openfire]# # 设置权限 [root@yfw openfire]# sudo chown openfire:openfire /opt/openfire/conf/openfire.xml [root@yfw openfire]# sudo chmod 644 /opt/openfire/conf/openfire.xml [root@yfw openfire]# sudo chown -R openfire:openfire /opt/openfire/logs [root@yfw openfire]# sudo chmod -R 755 /opt/openfire/logs [root@yfw openfire]# sudo su - openfire Last login: Sat Nov 15 17:22:29 CST 2025 on pts/0 ✅ JAVA_HOME: /usr/lib/jvm/java-11-openjdk ✅ Maven home: /opt/maven ✅ Java version: openjdk version "11.0.13" 2021-10-19 LTS ✅ Environment loaded for openfire PATH = /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/lib/jvm/java-11-openjdk/bin:/opt/maven/bin:/usr/local/ffmpeg/bin:/opt/spark/bin JAVA_HOME = /usr/lib/jvm/java-11-openjdk [openfire@yfw ~]$ cd /opt/openfire [openfire@yfw openfire]$ ./bin/start.sh --no-daemon Starting OpenFire in foreground mode... 17:35:21.754 [main] ERROR org.jivesoftware.util.JiveGlobals - Unable to load default security properties from: /opt/openfire/conf/openfire.xml java.io.IOException: XML properties file must be writable: security.xml at org.jivesoftware.util.XMLProperties.<init>(XMLProperties.java:156) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.loadSecurityProperties(JiveGlobals.java:1312) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.isXMLPropertyEncrypted(JiveGlobals.java:1010) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.XMLProperties.getProperty(XMLProperties.java:212) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.XMLProperties.getProperty(XMLProperties.java:171) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.getXMLProperty(JiveGlobals.java:310) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.initialize(XMPPServer.java:367) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:658) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:221) [xmppserver-5.0.2.jar:5.0.2] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) [?:?] at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:?] at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) [?:?] at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) [?:?] at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) [?:?] at java.lang.Class.newInstance(Class.java:645) [?:?] at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) [startup.jar:5.0.2] at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) [startup.jar:5.0.2] 17:35:21.791 [main] ERROR org.jivesoftware.util.JiveProperties - null java.lang.NullPointerException: null at java.lang.Class.forName0(Native Method) ~[?:?] at java.lang.Class.forName(Class.java:375) ~[?:?] at org.jivesoftware.database.DefaultConnectionProvider.start(DefaultConnectionProvider.java:99) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.database.DbConnectionManager.setConnectionProvider(DbConnectionManager.java:652) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.database.DbConnectionManager.ensureConnectionProvider(DbConnectionManager.java:109) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.database.DbConnectionManager.getConnection(DbConnectionManager.java:162) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveProperties.loadProperties(JiveProperties.java:472) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveProperties.init(JiveProperties.java:108) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveProperties.getInstance(JiveProperties.java:84) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.getProperty(JiveGlobals.java:547) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.cache.CacheFactory.<clinit>(CacheFactory.java:102) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.initialize(XMPPServer.java:381) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:658) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:221) [xmppserver-5.0.2.jar:5.0.2] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) [?:?] at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:?] at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) [?:?] at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) [?:?] at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) [?:?] at java.lang.Class.newInstance(Class.java:645) [?:?] at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) [startup.jar:5.0.2] at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) [startup.jar:5.0.2] Database setup or configuration error: Please verify your database settings and check the logs/openfire.log file for detailed error messages. 17:35:24.385 [main] ERROR org.jivesoftware.openfire.XMPPServer - Database could not be accessed java.sql.SQLException: ConnectionManager.getConnection() failed to obtain a connection after 11 attempts. The exception from the last attempt is as follows: java.sql.SQLException: Check JDBC properties; data source was not be initialised at org.jivesoftware.database.DbConnectionManager.getConnection(DbConnectionManager.java:204) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:1010) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:666) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:221) [xmppserver-5.0.2.jar:5.0.2] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) [?:?] at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:?] at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) [?:?] at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) [?:?] at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) [?:?] at java.lang.Class.newInstance(Class.java:645) [?:?] at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) [startup.jar:5.0.2] at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) [startup.jar:5.0.2] java.lang.IllegalArgumentException: java.sql.SQLException: ConnectionManager.getConnection() failed to obtain a connection after 11 attempts. The exception from the last attempt is as follows: java.sql.SQLException: Check JDBC properties; data source was not be initialised at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:1020) at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:666) at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:221) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) at java.base/jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) at java.base/java.lang.Class.newInstance(Class.java:645) at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) Caused by: java.sql.SQLException: ConnectionManager.getConnection() failed to obtain a connection after 11 attempts. The exception from the last attempt is as follows: java.sql.SQLException: Check JDBC properties; data source was not be initialised at org.jivesoftware.database.DbConnectionManager.getConnection(DbConnectionManager.java:204) at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:1010) ... 11 more 17:35:24.386 [main] ERROR org.jivesoftware.openfire.XMPPServer - java.sql.SQLException: ConnectionManager.getConnection() failed to obtain a connection after 11 attempts. The exception from the last attempt is as follows: java.sql.SQLException: Check JDBC properties; data source was not be initialised java.lang.IllegalArgumentException: java.sql.SQLException: ConnectionManager.getConnection() failed to obtain a connection after 11 attempts. The exception from the last attempt is as follows: java.sql.SQLException: Check JDBC properties; data source was not be initialised at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:1020) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:666) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:221) [xmppserver-5.0.2.jar:5.0.2] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) [?:?] at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:?] at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) [?:?] at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) [?:?] at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) [?:?] at java.lang.Class.newInstance(Class.java:645) [?:?] at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) [startup.jar:5.0.2] at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) [startup.jar:5.0.2] Caused by: java.sql.SQLException: ConnectionManager.getConnection() failed to obtain a connection after 11 attempts. The exception from the last attempt is as follows: java.sql.SQLException: Check JDBC properties; data source was not be initialised at org.jivesoftware.database.DbConnectionManager.getConnection(DbConnectionManager.java:204) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:1010) ~[xmppserver-5.0.2.jar:5.0.2] ... 11 more Error starting the server. Please check the log files for more information.
最新发布
11-16
java.io.IOException: XML properties file must be writable: security.xml ``` **原因**：OpenFire 尝试创建或写入 `/opt/openfire/conf/security.xml` 失败，因为： - `conf/` 目录权限不对 - `openfire` 用户...
[root@yfw ~]# cd /opt/openfire [root@yfw openfire]# sudo systemctl stop openfire [root@yfw openfire]# [root@yfw openfire]# # 彻底删除整个目录（不仅仅是内容） [root@yfw openfire]# sudo rm -rf /opt/openfire/embedded-db [root@yfw openfire]# [root@yfw openfire]# # 重新创建，并确保归属正确 [root@yfw openfire]# sudo mkdir -p /opt/openfire/embedded-db [root@yfw openfire]# [root@yfw openfire]# # 设置所有者为 openfire [root@yfw openfire]# sudo chown -R openfire:openfire /opt/openfire/embedded-db [root@yfw openfire]# sudo chmod 755 /opt/openfire/embedded-db [root@yfw openfire]# ls -l /opt/openfire/lib/derby-*.jar -rw-r--r-- 1 openfire openfire 3232770 Nov 15 15:46 /opt/openfire/lib/derby-10.14.2.0.jar [root@yfw openfire]# # 确保文件可被 openfire 用户写入 [root@yfw openfire]# sudo touch /opt/openfire/conf/security.xml [root@yfw openfire]# sudo chown openfire:openfire /opt/openfire/conf/security.xml [root@yfw openfire]# sudo chmod 664 /opt/openfire/conf/security.xml [root@yfw openfire]# sudo su - openfire -s /bin/bash -c ' > cat > /opt/openfire/conf/security.xml << EOF > <?xml version="1.0" encoding="UTF-8"?> > <jive> > <adminConsole> > <port>9090</port> > <securePort>9091</securePort> > <secure>false</secure> > <encryption>none</encryption> > </adminConsole> > <sasl> > <active>true</active> > </sasl> > </jive> > EOF > ' ✅ Environment loaded for openfire PATH = /usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/lib/jvm/java-11-openjdk/bin:/opt/maven/bin:/usr/local/ffmpeg/bin:/opt/spark/bin JAVA_HOME = /usr/lib/jvm/java-11-openjdk -bash: line 1: /opt/openfire/conf/security.xml: Permission denied [root@yfw openfire]# > /opt/openfire/logs/nohup.out [root@yfw openfire]# rm -f /opt/openfire/logs/openfire.pid [root@yfw openfire]# sudo systemctl start openfire [root@yfw openfire]# tail -f /opt/openfire/logs/nohup.out at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) [?:?] at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) [?:?] at java.lang.Class.newInstance(Class.java:645) [?:?] at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) [startup.jar:5.0.2] at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) [startup.jar:5.0.2] Caused by: java.sql.SQLException: ConnectionManager.getConnection() failed to obtain a connection after 11 attempts. The exception from the last attempt is as follows: java.sql.SQLException: Failed to create database '/opt/openfire/embedded-db', see the next exception for details. at org.jivesoftware.database.DbConnectionManager.getConnection(DbConnectionManager.java:204) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.verifyDataSource(XMPPServer.java:1010) ~[xmppserver-5.0.2.jar:5.0.2] ... 11 more 启动服务器时出错。有关详细信息，请查看日志文件。 tail: /opt/openfire/logs/nohup.out: file truncated 15:50:50.342 [main] ERROR org.jivesoftware.util.JiveGlobals - Unable to load default Openfire properties from: /opt/openfire/conf/openfire.xml java.io.IOException: XML properties file must be writable: openfire.xml at org.jivesoftware.util.XMLProperties.<init>(XMLProperties.java:156) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.loadOpenfireProperties(JiveGlobals.java:1276) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.getXMLProperty(JiveGlobals.java:308) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.initialize(XMPPServer.java:367) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:658) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:221) [xmppserver-5.0.2.jar:5.0.2] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) [?:?] at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:?] at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) [?:?] at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) [?:?] at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) [?:?] at java.lang.Class.newInstance(Class.java:645) [?:?] at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) [startup.jar:5.0.2] at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) [startup.jar:5.0.2] Openfire 5.0.2 [2025年11月15日 下午3:50:50] Halting server... Server halted Halting server... Server halted tail: /opt/openfire/logs/nohup.out: file truncated 15:51:03.119 [main] ERROR org.jivesoftware.util.JiveGlobals - Unable to load default Openfire properties from: /opt/openfire/conf/openfire.xml java.io.IOException: XML properties file must be writable: openfire.xml at org.jivesoftware.util.XMLProperties.<init>(XMLProperties.java:156) ~[xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.loadOpenfireProperties(JiveGlobals.java:1276) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.util.JiveGlobals.getXMLProperty(JiveGlobals.java:308) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.initialize(XMPPServer.java:367) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:658) [xmppserver-5.0.2.jar:5.0.2] at org.jivesoftware.openfire.XMPPServer.<init>(XMPPServer.java:221) [xmppserver-5.0.2.jar:5.0.2] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) [?:?] at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:?] at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) [?:?] at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) [?:?] at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:347) [?:?] at java.lang.Class.newInstance(Class.java:645) [?:?] at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:92) [startup.jar:5.0.2] at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:56) [startup.jar:5.0.2] Openfire 5.0.2 [2025年11月15日 下午3:51:03] 管理控制台正在侦听 http://ecs-124-71-230-244.compute.hwclouds-dns.com:9090
11-16
java.io.IOException: XML properties file must be writable: openfire.xml ... Openfire 5.0.2 [2025年11月15日 下午3:51:03] 管理控制台正在侦听 http://ecs-124-71-230-244.compute.hwclouds-dns.com:9090 ``` ...
从hdfs到mysql报错Warning: /usr/local/sqoop/../hcatalog does not exist! HCatalog jobs will fail. Please set $HCAT_HOME to the root of your HCatalog installation. Warning: /usr/local/sqoop/../accumulo does not exist! Accumulo imports will fail. Please set $ACCUMULO_HOME to the root of your Accumulo installation. Warning: /usr/local/sqoop/../zookeeper does not exist! Accumulo imports will fail. Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation. 错误: 找不到或无法加载主类 org.apache.hadoop.hbase.util.GetJavaProperty 2025-06-05 17:41:55,556 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6 2025-06-05 17:41:55,583 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead. 2025-06-05 17:41:55,664 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset. 2025-06-05 17:41:55,664 INFO tool.CodeGenTool: Using existing jar: /tmp/sqoop-hadoop/compile/8b77c7c2bee6c4dd7f3856618f5f8556/user_action.jar 2025-06-05 17:41:55,668 INFO mapreduce.ExportJobBase: Beginning export of user_action 2025-06-05 17:41:55,668 INFO Configuration.deprecation: mapred.job.tracker is deprecated. Instead, use mapreduce.jobtracker.address 2025-06-05 17:41:55,827 INFO Configuration.deprecation: mapred.jar is deprecated. Instead, use mapreduce.job.jar 2025-06-05 17:41:56,366 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false Thu Jun 05 17:41:56 CST 2025 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. 2025-06-05 17:41:56,900 INFO Configuration.deprecation: mapred.reduce.tasks.speculative.execution is deprecated. Instead, use mapreduce.reduce.speculative 2025-06-05 17:41:56,902 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative 2025-06-05 17:41:56,904 INFO Configuration.deprecation: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps 2025-06-05 17:41:56,967 INFO impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2025-06-05 17:41:57,035 INFO impl.MetricsSystemImpl: Scheduled Metric snapshot period at 10 second(s). 2025-06-05 17:41:57,035 INFO impl.MetricsSystemImpl: JobTracker metrics system started 2025-06-05 17:41:57,104 INFO input.FileInputFormat: Total input files to process : 1 2025-06-05 17:41:57,111 INFO input.FileInputFormat: Total input files to process : 1 2025-06-05 17:41:57,139 INFO mapreduce.JobSubmitter: number of splits:4 2025-06-05 17:41:57,159 INFO Configuration.deprecation: mapred.map.tasks.speculative.execution is deprecated. Instead, use mapreduce.map.speculative 2025-06-05 17:41:57,236 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_local1705881514_0001 2025-06-05 17:41:57,236 INFO mapreduce.JobSubmitter: Executing with tokens: [] 2025-06-05 17:41:57,374 INFO mapred.LocalDistributedCacheManager: Creating symlink: /usr/local/hadoop/tmp/mapred/local/1749116517294/libjars <- /usr/local/sqoop/libjars/* 2025-06-05 17:41:57,376 INFO mapred.LocalDistributedCacheManager: Localized file:/tmp/hadoop/mapred/staging/hadoop1705881514/.staging/job_local1705881514_0001/libjars as file:/usr/local/hadoop/tmp/mapred/local/1749116517294/libjars 2025-06-05 17:41:57,408 INFO mapreduce.Job: The url to track the job: http://localhost:8080/ 2025-06-05 17:41:57,409 INFO mapreduce.Job: Running job: job_local1705881514_0001 2025-06-05 17:41:57,413 INFO mapred.LocalJobRunner: OutputCommitter set in config null 2025-06-05 17:41:57,416 INFO mapred.LocalJobRunner: OutputCommitter is org.apache.sqoop.mapreduce.NullOutputCommitter 2025-06-05 17:41:57,455 INFO mapred.LocalJobRunner: Waiting for map tasks 2025-06-05 17:41:57,456 INFO mapred.LocalJobRunner: Starting task: attempt_local1705881514_0001_m_000000_0 2025-06-05 17:41:57,492 INFO mapred.Task: Using ResourceCalculatorProcessTree : [ ] 2025-06-05 17:41:57,499 INFO mapred.MapTask: Processing split: Paths:/user/hive/warehouse/dblab.db/user_action/000000_0:11692413+1948736,/user/hive/warehouse/dblab.db/user_action/000000_0:13641149+1948737 2025-06-05 17:41:57,507 INFO Configuration.deprecation: map.input.file is deprecated. Instead, use mapreduce.map.input.file 2025-06-05 17:41:57,507 INFO Configuration.deprecation: map.input.start is deprecated. Instead, use mapreduce.map.input.start 2025-06-05 17:41:57,507 INFO Configuration.deprecation: map.input.length is deprecated. Instead, use mapreduce.map.input.length 2025-06-05 17:41:57,515 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false Thu Jun 05 17:41:57 CST 2025 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. 2025-06-05 17:41:57,543 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false 2025-06-05 17:41:57,548 INFO mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=false 2025-06-05 17:41:57,551 INFO mapred.LocalJobRunner: Starting task: attempt_local1705881514_0001_m_000001_0 2025-06-05 17:41:57,552 INFO mapred.Task: Using ResourceCalculatorProcessTree : [ ] 2025-06-05 17:41:57,553 INFO mapred.MapTask: Processing split: Paths:/user/hive/warehouse/dblab.db/user_action/000000_0:0+3897471 2025-06-05 17:41:57,562 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false Thu Jun 05 17:41:57 CST 2025 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. 2025-06-05 17:41:57,574 INFO mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=false 2025-06-05 17:41:57,577 INFO mapred.LocalJobRunner: Starting task: attempt_local1705881514_0001_m_000002_0 2025-06-05 17:41:57,578 INFO mapred.Task: Using ResourceCalculatorProcessTree : [ ] 2025-06-05 17:41:57,579 INFO mapred.MapTask: Processing split: Paths:/user/hive/warehouse/dblab.db/user_action/000000_0:3897471+3897471 2025-06-05 17:41:57,583 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false Thu Jun 05 17:41:57 CST 2025 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. 2025-06-05 17:41:57,603 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false 2025-06-05 17:41:57,607 INFO mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=false 2025-06-05 17:41:57,614 INFO mapred.LocalJobRunner: Starting task: attempt_local1705881514_0001_m_000003_0 2025-06-05 17:41:57,616 INFO mapred.Task: Using ResourceCalculatorProcessTree : [ ] 2025-06-05 17:41:57,617 INFO mapred.MapTask: Processing split: Paths:/user/hive/warehouse/dblab.db/user_action/000000_0:7794942+3897471 2025-06-05 17:41:57,623 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false Thu Jun 05 17:41:57 CST 2025 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. 2025-06-05 17:41:57,638 INFO sasl.SaslDataTransferClient: SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = false 2025-06-05 17:41:57,640 INFO mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=false 2025-06-05 17:41:57,641 INFO mapred.LocalJobRunner: map task executor complete. 2025-06-05 17:41:57,642 WARN mapred.LocalJobRunner: job_local1705881514_0001 java.lang.Exception: java.io.IOException: java.lang.ClassNotFoundException: user_action at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:492) at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:552) Caused by: java.io.IOException: java.lang.ClassNotFoundException: user_action at org.apache.sqoop.mapreduce.TextExportMapper.setup(TextExportMapper.java:70) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:143) at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:799) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:347) at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:271) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.ClassNotFoundException: user_action at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at org.apache.sqoop.mapreduce.TextExportMapper.setup(TextExportMapper.java:66) ... 10 more 2025-06-05 17:41:58,413 INFO mapreduce.Job: Job job_local1705881514_0001 running in uber mode : false 2025-06-05 17:41:58,414 INFO mapreduce.Job: map 0% reduce 0% 2025-06-05 17:41:58,416 INFO mapreduce.Job: Job job_local1705881514_0001 failed with state FAILED due to: NA 2025-06-05 17:41:58,422 INFO mapreduce.Job: Counters: 0 2025-06-05 17:41:58,432 WARN mapreduce.Counters: Group FileSystemCounters is deprecated. Use org.apache.hadoop.mapreduce.FileSystemCounter instead 2025-06-05 17:41:58,434 INFO mapreduce.ExportJobBase: Transferred 0 bytes in 1.5124 seconds (0 bytes/sec) 2025-06-05 17:41:58,436 WARN mapreduce.Counters: Group org.apache.hadoop.mapred.Task$Counter is deprecated. Use org.apache.hadoop.mapreduce.TaskCounter instead 2025-06-05 17:41:58,436 INFO mapreduce.ExportJobBase: Exported 0 records. 2025-06-05 17:41:58,437 ERROR tool.ExportTool: Error during export: Export job failed!
06-06
步骤2：检查JDBC驱动版本是否与当前Java版本兼容-参考引用[1]中出现了UnsupportedClassVersionError，这通常是因为编译JDBC驱动的Java版本（比如用Java8编译）与当前运行Sqoop的Java版本（比如Java7）不一致。...
Zookeeper（五）Watcher机制
jjavaboy的专栏
10-22 818
0.Watcher结构和传参 先看看Watcher定义的结构： public interface Watcher { /** * This interface defines the possible states an Event may represent */ public interface Event { /**
android 请求服务器抛io异常,Android开发中与服务器交互时，遇到java.io.IOException: Target host must not be null的问题...
weixin_36413546的博客
05-25 374
当我遇到这个问题的时候，也在网上查找好半天。找到了一个和这个问题很类似的问题——java.lang.IllegalStateException: Target host must not be null这个里面报的是IllegalStateException，翻译过来是非法状态异常，这个是url的状态，一般来说会是地址不正确(如：在地址的开头缺少http://)。不过，我遇到的是com.lidro...
HttpClient：Target host must not be null, or set in parameters
天外来客1009
06-24 2760
HttpClient client = new DefaultHttpClient();  HttpGet get = new HttpGet("www.baidu.com");  HttpResponse response = client.execute(get); 抛出异常：Target host must not be null, or set in parameters原因是：url写法
Error: Target host must not be null, or set in parameters
万里晴空
12-09 1818
This code was not able to recognize it as a valid URI. 可能出错原因： 1.程序是从配置文件中读取url，但是实际上忘了在配置文件中添加url public Configuration(String file) throws ServiceException { if (file == null) { file = DEFAUL
Target host must not be null, or set in paramers报错处理
suns
07-25 355
今天在做一个android项目，里面需要向一个网站发送一个请求，并对该请求回来的数据进行json数据解析。当我做完了后，程序却莫名报了这个错：   Caused by: java.lang.IllegalStateException: Target host must not be null, or set in parameters.   在网上找了找，发现报错的原因是因为没有在加url...
Target host must not be null /// host name may not be null 处理
zgf1991 IT新人
10-22 1万+
网上看的都是 Caused by: java.lang.IllegalStateException: Target host must not be null, or set in parameters.  报错的原因是因为没有在加url中加“http://”，加上http://就是解决方案。 /----------------------------------------
java.IOException: Target host must not be null, or set in parameters. scheme=null, host=null, path=
weixin_38899896的博客
08-30 2240
网上查找各种资料，大多数都是说 Target host must not be null, 这个错误要么是URL开头没有加http：//   要么就URL是有非法字符的说法，但是我这边检查了很多次， URL完全符合访问要求，pc浏览器试过，然后手机自带的浏览器也可以访问，所以问题重点就出现在  or set in parameters。scheme = null，host = null，path...
URL must not be null
weixin_43988238的博客
09-29 4847
URL must not be null 一、从svn拉取项目，使用的是springMVC,（启动不断的报错，没有详细的项目手册，只能一点点试，很烦这一点） 二、出现“URL must not be null”错误的时候，我是把tomcat8改成tomcat7解决的 三、最后各版本定为：jdk1.8 tomcat7 maven 小于等于 3.6 四、在找开发工具的时候发现老版本的东西特别难找，有的东西官网已经不维护了，但是项目还需要，以下都是windows版本 jdk: 链接：https://pan.bai
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