From: Ellen Spertus <spertus@ella.mills.edu>
To: pgsql-interfaces@postgresql.org
Cc: spertus@ella.mills.edu
Subject: Problem with JDBC and blobtest
Date: 19 Jun 1999 19:59:16 -0700
Message-ID: <19990620025916.94089.qmail@ella.mills.edu> (raw)
I am getting a NullPointerException when running blobtest. I am using the latest version of everything:
- postgresql 6.5
- jdk 1.2
- jdbc6.5-1.2
- the version of blobtest.java that came with postgresql 6.5
- OS: RH6.0
- x86 (AMD K6)
Here's what happens when I run the program:
[ellen@ellen Work]$ jdb blobtest "jdbc:postgresql://localhost:5432/webdb" ellen foo debug
Initializing jdb...
0xb0:class(blobtest)
> run
run blobtest jdbc:postgresql://localhost:5432/webdb ellen foo debug
PostgreSQL blobtest v6.3 rev 1
running ...
main[1]
DriverManager.initialize: jdbc.drivers = null
JDBC DriverManager initialized
registerDriver: driver[className=postgresql.Driver,postgresql.Driver@3f720c84]
Connecting to Database URL = jdbc:postgresql://localhost:5432/webdb
DriverManager.getConnection("jdbc:postgresql://localhost:5432/webdb")
trying driver[className=postgresql.Driver,postgresql.Driver@3f720c84]
-- listing properties --
password=foo
PGHOST=localhost
user=ellen
PGDBNAME=webdb
Protocol=postgresql
PGPORT=5432
Using postgresql.jdbc2.Connection
getConnection returning driver[className=postgresql.Driver,postgresql.Driver@3f720c84]
Connected...Now creating a statement
----------------------------------------------------------------------
Testing postgresql large object api
Gaining access to large object api
Large Object initialised
Test 1 Creating a large object
Creating a large object
got large object oid=19521
got large object obj=postgresql.largeobject.LargeObject@c2ae0c84
Opening test source object
Copying file to large object
Block size=2048 offset=0
Exception caught.
java.lang.NullPointerException
java.lang.NullPointerException
at java.io.Writer.write(Writer.java:130)
at java.io.PrintStream.write(PrintStream.java:271)
at java.io.PrintStream.print(PrintStream.java:426)
at java.io.PrintStream.println(PrintStream.java:545)
at java.lang.Throwable.printStackTrace(Throwable.java:195)
at java.sql.SQLException.<init>(SQLException.java:103)
at postgresql.util.PSQLException.<init>(PSQLException.java:42)
at postgresql.fastpath.Fastpath.fastpath(Fastpath.java:141)
at postgresql.fastpath.Fastpath.fastpath(Fastpath.java:188)
at postgresql.largeobject.LargeObject.write(LargeObject.java:173)
at postgresql.largeobject.LargeObject.write(LargeObject.java:188)
at blobtest.ownapi_test1(blobtest.java:105)
at blobtest.ownapi(blobtest.java:76)
at blobtest.<init>(blobtest.java:50)
at blobtest.main(blobtest.java:187)
at sun.tools.agent.MainThread.runMain(Native Method)
at sun.tools.agent.MainThread.run(MainThread.java:49)
Current thread "main" died. Execution continuing...
>
blobtest exited
The line that generates the exception (blobtest.java:105) is indicated below:
// copy the data
System.out.println("Copying file to large object");
byte buf[] = new byte[2048];
int s,tl=0;
while((s=fis.read(buf,0,2048))>0) {
System.out.println("Block size="+s+" offset="+tl);
*** obj.write(buf,0,s);
tl+=s;
}
Any ideas?
Ellen
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To: pgsql-interfaces@postgresql.org
Cc: spertus@ella.mills.edu
Subject: Re: Problem with JDBC and blobtest
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