Hi,
In my very simple process I have next error at the transition to timer step:
2016-06-07 19:48:24 ERROR AcquireAsyncJobsDueRunnable:85 - exception during async job acquisition: org/activiti/engine/impl/asyncexecutor/ExecuteAsyncRunnable
java.lang.NoClassDefFoundError: org/activiti/engine/impl/asyncexecutor/ExecuteAsyncRunnable
at org.activiti.spring.SpringAsyncExecutor.executeAsyncJob(SpringAsyncExecutor.java:82)
at org.activiti.engine.impl.asyncexecutor.AcquireAsyncJobsDueRunnable.run(AcquireAsyncJobsDueRunnable.java:56)
at java.lang.Thread.run(Thread.java:745)
I've tried to use it at very simple process Start->ServiceTask->Timer->ServiceTask2->End
And I have error after ServiceTask finished.
In case I've removed Timer from chain - both ServiceTask works as expected
This error occurs on linux machine under Apache Tomcat/7.0.54
Also note, what locally all works good under in case I am starting application over maven tomcat plugin
I am using spring integration with autoconfiguration.
I am new in Java, so can't say is it important or not, but there is next log messages at startup:
INFO: validateJarFile(/usr/share/tomcat/webapps/mis-activiti/WEB-INF/lib/tomcat-embed-el-8.0.32.jar) - jar not loaded. See Servlet Spec 3.0, section 10.7.2. Offending class: javax/el/Expression.class
Please, let me know if you need more details.