Java UnsatisfiedLinkError exception when connecting to Postgresql database
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? Thanks in advance.
Re: Java UnsatisfiedLinkError exception when connecting to Postgresql database
Adrian Klaver wrote: > On 11/14/18 10:24 AM, dcl...@cinci.rr.com wrote: > Please reply to list also. > Ccing list. > > > > Adrian Klaver wrote: > >> On 11/14/18 9:25 AM, dcl...@cinci.rr.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.
Re: Java UnsatisfiedLinkError exception when connecting to Postgresql database
Rob Sargent wrote: > > On 11/14/18 5:03 PM, dcl...@cinci.rr.com wrote: > > Adrian Klaver wrote: > >> On 11/14/18 10:24 AM, dcl...@cinci.rr.com wrote: > >> Please reply to list also. > >> Ccing list. > >>> Adrian Klaver wrote: > On 11/14/18 9:25 AM, dcl...@cinci.rr.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. > > > > > 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.
