title: Jmeter error org.postgresql.jdbc3g.Jdbc3gConnection.isValid(I)Z
body: <p>I am geting the following error when i run a test scenario...I am using</p>
  <blockquote>
  <p>postgresql-42.4.1 jar ,</p>
  </blockquote>
  <p>java.lang.AbstractMethodError:    org.postgresql.jdbc3g.Jdbc3gConnection.isValid(I)Z    at
  org.apache.commons.dbcp2.DelegatingConnection.isValid(DelegatingConnection.java:590)
  ~[commons-dbcp2-2.9.0.jar:2.9.0]    at
  org.apache.commons.dbcp2.PoolableConnection.validate(PoolableConnection.java:334)
  ~[commons-dbcp2-2.9.0.jar:2.9.0]    at
  org.apache.commons.dbcp2.PoolableConnectionFactory.validateConnection(PoolableConnectionFactory.java:653)
  ~[commons-dbcp2-2.9.0.jar:2.9.0]    at
  org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:109)
  ~[commons-dbcp2-2.9.0.jar:2.9.0]    at
  org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:649)
  ~[commons-dbcp2-2.9.0.jar:2.9.0]    at
  org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:531)
  ~[commons-dbcp2-2.9.0.jar:2.9.0]    at
  org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:731)
  ~[commons-dbcp2-2.9.0.jar:2.9.0]    at
  org.apache.jmeter.protocol.jdbc.config.DataSourceElement$DataSourceComponentImpl.getConnection(DataSourceElement.java:362)
  ~[ApacheJMeter_jdbc.jar:5.5]    at
  org.apache.jmeter.protocol.jdbc.config.DataSourceElement.getConnection(DataSourceElement.java:199)
  ~[ApacheJMeter_jdbc.jar:5.5]    at
  org.apache.jmeter.protocol.jdbc.sampler.JDBCSampler.sample(JDBCSampler.java:80)
  ~[ApacheJMeter_jdbc.jar:5.5]    at
  org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:651)
  ~[ApacheJMeter_core.jar:5.5]    at
  org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:570)
  ~[ApacheJMeter_core.jar:5.5]    at
  org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:501)
  ~[ApacheJMeter_core.jar:5.5]    at
  org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:268)
  ~[ApacheJMeter_core.jar:5.5]    at
  java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_301]</p>
  <p><a href="https://i.stack.imgur.com/MqpJa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MqpJa.png" alt="enter image description here" /></a></p>