Am 25. Juli 2019 08:07:18 MESZ schrieb Clemens Wyss DEV <clemens...@mysign.ch>: >Note: I have moved this "issue" over to the tomcat-dev mailinglist ... > >-----Ursprüngliche Nachricht----- >Von: Clemens Wyss DEV <clemens...@mysign.ch> >Gesendet: Mittwoch, 24. Juli 2019 11:07 >An: 'Tomcat Users List' <users@tomcat.apache.org> >Betreff: PooledConnection#connectUsingDriver, >Thread.currentThread().getContextClassLoader() is null > >Context: >Debian GNU/Linux 9 \n \l >java version 1.8.0_162 >Tomcat 8.5.35 > >From time to time we are facing the follwing exception (call stack): >... >Caused by: java.sql.SQLException: Unable to load class: >org.mariadb.jdbc.Driver from >ClassLoader:java.net.URLClassLoader@4c873330;ClassLoader:null >at >org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:292) >at >org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:212) >at >org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:736) >at >org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:668) >at >org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:198) >at >org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:132) > at org.apache.torque.Torque.getConnection(Torque.java:924) > ... 53 common frames omitted >Caused by: java.lang.ClassNotFoundException: Unable to load class: >org.mariadb.jdbc.Driver from >ClassLoader:java.net.URLClassLoader@4c873330;ClassLoader:null >at >org.apache.tomcat.jdbc.pool.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:56) >at >org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:280) > ... 59 common frames omitted >Caused by: java.lang.ClassNotFoundException: Classloader is null >at >org.apache.tomcat.jdbc.pool.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:40) > ... 60 common frames omitted > >According to the code (in PooledConnection# connectUsingDriver) >Thread.currentThread().getContextClassLoader() returns null > >Googling for " Thread.currentThread().getContextClassLoader() is null" >the common demoniator seems to be `getContextClassLoader can be null`. >If this is true there should be >a) a null-check in PooledConnection# connectUsingDriver >b) if null, then there should be a fallback-Classloader (the system >class laoder?) > >WDYT ? > >Or any ideas why the given exception pops up from time to time > >Thx >Clemens >B�KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKCB�� [��X��ܚX�KK[XZ[ >� \�\��][��X��ܚX�P �X�] >�\X�K�ܙ�B��܈Y][ۘ[��[X[� �K[XZ[ >� \�\��Z[ �X�] >�\X�K�ܙ�B� > >--------------------------------------------------------------------- >To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >For additional commands, e-mail: users-h...@tomcat.apache.org >>
Hi, Is the driver part of the web app or installed in tomcat's lib directory? Does the error happen after startup of tomcat or after running for some time? With kind regards Thomas -- Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
