< mais c'était rapide 😉 > >+1 should/can I file a bug? > init at bootstrap the pool (initial size) to ensure it is in one tomcat > classloader how would you achieve this? By setting «initialSize» to «maxSize» in PoolProperties?
---------------------------------------------------------- Von: Romain Manni-Bucau <rmannibu...@gmail.com> Gesendet: Donnerstag, 25. Juli 2019 07:30 An: Tomcat Developers List <dev@tomcat.apache.org> Betreff: Re: PooledConnection#connectUsingDriver, Thread.currentThread().getContextClassLoader() is null +1, there is no real other option AFAIK until you init at bootstrap the pool (initial size) to ensure it is in one tomcat classloader. Le jeu. 25 juil. 2019 à 07:08, Clemens Wyss DEV <mailto:clemens...@mysign.ch> a écrit : I tried posting this in the tomcat-users-ml, but I guess it rather fits here: ---------------------------------------------------------- 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:http://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:http://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 --------------------------------------------------------------------- To unsubscribe, e-mail: mailto:dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: mailto:dev-h...@tomcat.apache.org
