The problem of PDF layouts

[baba.yudai]

Hi helper

We are trying to solve the following problem.
Please give us some help.

●Problem
We upgraded some parts of the application like Apache,Java or Tomcat.
After then, there are two problems in creating PDF with JasperReports.
1.Although modifying the paragraph setting,  the rule won't be valid.
2.the height of lines are changed higher, so the number of lines per page are changed.

●Enviroment
                                      new                       past

OS                        Linux(RHEL)7.7      Linux(RHEL)6.4
DB                        PostgreSQL 11.3     PostgreSQL 9.2.7
FW                        xenlon1.6                 xenlon1.6
JasperReports        5.1.0                        5.1.0
Java                       8                               7
Apache                  2.4.39                       2.4.33
Tomcat                  9.0.21                      7.0.54

●Premise
・We don't chenge  programs or enviroment files of the application.
・Stretch With Overflow is set "true".
・Jrxml is the following setting.
  <property name="net.sf.jasperreports.export.pdf.force.linebreak.policy" value="true"/>
 
●The supposed cause of the problem
We guess that JasperReports and OS are badly interacted with each other.

●Our questions
・Have you ever experiencd the same problems of us?
  How did you solve the problem?
・Do you know the reason of the problems?
  Please show me the way of  preventing the problem.

If you need more information to solve the problem, we provide you additional explanations in detail!