Re: Java UnsatisfiedLinkError exception when connecting to Postgresql database

[<dclark@xxxxxxxxxxxx>]

---- Rob Sargent <robjsargent@xxxxxxxxx> wrote: 
> 
> On 11/14/18 5:03 PM, dclark@xxxxxxxxxxxx wrote:
> > ---- Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
> >> On 11/14/18 10:24 AM, dclark@xxxxxxxxxxxx wrote:
> >> Please reply to list also.
> >> Ccing list.
> >>> ---- Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
> >>>> On 11/14/18 9:25 AM, dclark@xxxxxxxxxxxx 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.
> >
> >
> Should OpenJDK be looking for a sun class?

Ah ha, that's it.  Part of the deployment on the problem system was outdated.

Thanks to all.