Hi
You are using java 8 with maven, it download Postgres driver for java 8,
and then deploy it in a tomcat 7.
You must use the same java version.
Or you can force the postgres driver version in the root pom.xml.
A clean package is mandatory to delete the bad downloaded driver
regards
Adán
Hi,
I am upgrading from DSpace 5.6 Mirage2 to 5.9 Mirage2 in our test
environment (from dspace-5.9-src-release.tar.gz). The following steps
appear to be successful.
$ mvn package -Dmirage2.on=true
$ ant update
However, the following step throws an exception.
$ cd [dspace]
$ bin/dspace version
DSpace version: 5.9
SCM revision: ${buildNumber}
SCM branch: UNKNOWN_BRANCH
OS: Linux(amd64) version 2.6.32-754.el6.x86_64
Exception: org/postgresql/Driver : Unsupported major.minor version 52.0
java.lang.UnsupportedClassVersionError: org/postgresql/Driver :
Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:808)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
...
I get the same exception for other dspace commands. Eg.
$ bin/dspace database test
My understanding is that this implies the new DSpace 5.9 PostgreSQL
JDBC driver requires Java 1.8 (as it was compiled with Java 1.8)
whereas the doco for DSpace 5.9 recommends using Java 1.7. Assuming
this is so, I guess I should change to Java 1.8. Can I use any version
of Oracle JDK or OpenJDK 1.8 with DSpace 5.x/5.9 or are some versions
unsuitable? I haven't attempted to start tomcat 7 yet.
My environment is:
- RHEL 6.10; 2.6.32-754.el6.x86_64 #1 SMP
- java/javac OpenJDK 1.7.0_191
- Apache Maven 3.0.5
- Apache Ant(TM) version 1.8.4
- Apache Tomcat/7.0.65
- postgres/psql (PostgreSQL) 9.2.23 [on a remote RHEL 7.5 server]
Thank you in advance.
Cheers, Grant
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