Re: Java UnsatisfiedLinkError exception when connecting to Postgresql database

---- Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> wrote:
> On 11/14/18 10:24 AM, dclark(at)cinci(dot)rr(dot)com wrote:
> Please reply to list also.
> Ccing list.
> >
> > ---- Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> wrote:
> >> On 11/14/18 9:25 AM, dclark(at)cinci(dot)rr(dot)com wrote:
> >>> Hello;
> >>>
> >>> I've written a Java program which uses Postgresql via JDBC. The program works fine on all RedHat systems I've tested except one, where it yields an UnsatisifiedLinkError. Here is the stack trace:
> >>>
> >>> sun.misc.VM.latestUserDefinedLoader0(Native
> >>> Method)
> >>> sun.misc.VM.latestUserDefinedLoader(VM.java:411)
> >>> java.io.ObjectInputStream.latestUserDefinedLoader(ObjectInputStream.java:2351)
> >>> java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:686)
> >>> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1866)
> >>> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1749)
> >>> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2040)
> >>> java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1571)
> >>> java.io.ObjectInputStream.readObject(ObjectInputStream.java:431)
> >>> org.postgresql.ds.common.BaseDataSource.readBaseObject(BaseDataSource.java:1210)
> >>> org.postgresql.ds.common.BaseDataSource.initializeFrom(BaseDataSource.java:1220)
> >>> org.postgresql.ds.PGPoolingDataSource.initialize(PGPoolingDataSource.java:267)
> >>> org.postgresql.ds.PGPoolingDataSource.getConnection(PGPoolingDataSource.java:324)
> >>>
> >>> Any ideas?
> >>
> >> What is different about the system that throws the error?
> >>
> >> For example:
> >>
> >> OS version
> >> JDBC version
> >> Postgres version
> >> Java version
> >
> > Thank you for your reply.
> >
> > OS on working system: Linux 3.10.0-693.11.6.el7.x86_64 x86_64
> > OS on problem system: Linux 3.10.0-693.21.1.el7.x86_64 x86_64
> >
> > JDBC version on both systems: 9.4.1209
> >
> > Postgres version on both systems: 9.6.5 on x86_64-redhat-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11), 64-bit
> >
> > Java version on both systems:
> >
> > openjdk version "1.8.0_171"
> > OpenJDK Runtime Environment (build 1.8.0_171-b10)
> > OpenJDK 64-Bit Server VM (build 25.171-b10, mixed mode)
> >
>
> Hmm.
> So what was the UnsatisifiedLinkError message, before the traceback above?

java.lang.UnsatisfiedLinkError: sun.misc.VM.latestUserDefinedLoader0()Ljava/lang/ClassLoader;

Thank you.