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https://issues.apache.org/jira/browse/DERBY-3243?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kathey Marsden updated DERBY-3243:
----------------------------------
Derby Info: [Patch Available, Existing Application Impact, Regression]
(was: [Regression, Existing Application Impact])
partial patch available.
> (jdbc net client) exception during normal iteration through "ResultSet" of
> "select * from t"
> --------------------------------------------------------------------------------------------
>
> Key: DERBY-3243
> URL: https://issues.apache.org/jira/browse/DERBY-3243
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.3.2.1
> Environment: ------------------ Java Information ------------------
> Java Version: 1.4.2_03
> Java Vendor: Sun Microsystems Inc.
> Java home: C:\Programme\Java\j2re1.4.2_03
> Java classpath: derbyclient.jar
> OS name: Windows XP
> OS architecture: x86
> OS version: 5.1
> Java user name: cbdqok
> Java user home: C:\Dokumente und Einstellungen\cbdqok
> Java user dir: D:\users\cbdqok\privat\osj\lib_derby_net\lib
> java.specification.name: Java Platform API Specification
> java.specification.version: 1.4
> --------- Derby Information --------
> JRE - JDBC: J2SE 1.4.2 - JDBC 3.0
> [D:\users\cbdqok\privat\osj\lib_derby_net\lib\derbyclient.jar] 10.3.1.4 -
> (561794)
> ------------------------------------------------------
> ----------------- Locale Information -----------------
> ------------------------------------------------------
> Reporter: Oliver Seidel
> Priority: Critical
> Attachments: derby-3243_fix_double_hashmap_entry_diff.txt,
> derby-3243_fix_double_hashmap_entry_stat.txt
>
>
> Thanks again to the DERBY developers.
> For my convenience I use the client/server variant of DERBY. This is where
> the error occurs. I have temporarily alleviated the problem for my case by
> using the embedded version.
> I'm forced to use outlook and have built a program which siphons the messages
> into a derby database (phase 1 -- table has two varchar fields and a clob).
> When reading them back (phase 2 -- simple select of all records in no
> particular order, all 3 attributes), it has developed an exception. This is
> a result of data volume. I have reduced the problem to a single
> demonstration program.
> This behaviour, and the fact that the error is not a "DERBY Exception", but a
> proper exception coming back from the JDBC call, leads me to the diagnosis
> that it is a derby network client jdbc problem.
> The problem has been reproduced once by Bryan Pendleton:
> http://www.nabble.com/IndexOutOfBoundsException-t4926228.html
> I'll try to attach the code "error.java"; it can also be found on:
> http://www.os10000.net/error.java
> Please use as follows:
> javac -classpath derby.jar:derbynet.jar error.java
> java -cp .:derby.jar:derbynet.jar error
> It will create a directory "test_db" and fill it with approx 120mb data.
> Then you will observe the failure.
> /* -*- Mode:Java; c-basic-offset:8 -*- */
> //
> --------------------------------------------------------------------------------
> public class error {
> //
> ------------------------------------------------------------------------
> public static final int port = 1527;
> public static final String host = "127.0.0.1";
> //
> ------------------------------------------------------------------------
> public static void log(String x) { System.out.println(x); };
> //
> ------------------------------------------------------------------------
> public static void log_stacktrace(Exception e) {
> java.io.StringWriter sw = new java.io.StringWriter();
> java.io.PrintWriter pw = new java.io.PrintWriter(sw);
> e.printStackTrace(pw);
> log(sw.toString());
> };
> //
> ------------------------------------------------------------------------
> public static void start_server() {
> try {
> org.apache.derby.drda.NetworkServerControl server =
> new
> org.apache.derby.drda.NetworkServerControl(java.net.InetAddress.getByName(host),port);
> server.start(null);
> try { java.lang.Thread.sleep(5000); } catch (Exception
> e) { };
> log("started DERBY on host "+host+" port
> "+Integer.toString(port)+".");
> } catch (Exception e) {
> log_stacktrace(e);
> };
> };
> //
> ------------------------------------------------------------------------
> public static java.sql.Connection con()
> throws java.sql.SQLException, java.lang.ClassNotFoundException {
> Class.forName("org.apache.derby.jdbc.ClientDriver");
> String x_dbse = "test_db";
> String x_user = ";user=os10000";
> String x_pass = ";password=ding";
> String x_crte = ";create=true";
> String x_msgs = ";retrieveMessagesFromServerOnGetMessage=true";
> String connect =
> "jdbc:derby://"+host+":"+port+"/"+x_dbse+x_user+x_crte+x_msgs;
> return java.sql.DriverManager.getConnection(connect);
> };
> //
> ----------------------------------------------------------------------
> public static String getclob(java.sql.Clob b) {
> java.io.CharArrayWriter caw = new java.io.CharArrayWriter();
> try {
> java.io.Reader rd = b.getCharacterStream();
> char cb[] = new char[4096];
> int off=0, bts = rd.read(cb);
> while (bts>0) { caw.write(cb,off,bts); off+=bts;
> bts=rd.read(cb); };
> rd.close();
> } catch(Exception e) {};
> String res = caw.toString();
> caw.close();
> return res;
> };
> //
> ----------------------------------------------------------------------
> public static class myclob implements java.sql.Clob {
> String v;
> public myclob(String z) { v=z; };
> public java.io.InputStream getAsciiStream() { return new
> java.io.ByteArrayInputStream(v.getBytes()); };
> public java.io.Reader getCharacterStream() { return new
> java.io.CharArrayReader(v.toCharArray()); };
> public String getSubString(long pos, int length) { return
> v.substring((int)pos,(int)(pos+length)); };
> public long length() { return v.length(); };
> public long position(java.sql.Clob pattern, long start) {
> return 0; };
> public long position(String pattern, long start) { return 0; };
> public java.io.OutputStream setAsciiStream(long pos) {
> new java.sql.SQLException("setAsciiStream not
> implemented."); return null; };
> public java.io.Writer setCharacterStream(long pos) {
> new java.sql.SQLException("setCharacterStream not
> implemented."); return null; };
> public int setString(long pos, String s) {
> new java.sql.SQLException("setString not
> implemented."); return -1; };
> public int setString(long pos, String s, int offset, int len) {
> new java.sql.SQLException("setString not
> implemented."); return -1; };
> public void truncate(long len) {
> new java.sql.SQLException("truncate not implemented.");
> };
> };
> public static java.sql.Clob putclob(String x) { return new myclob(x); };
>
> //
> ------------------------------------------------------------------------
> public static String getLob(java.sql.ResultSet rs, int arg)
> throws java.sql.SQLException { return getclob(rs.getClob(arg));
> };
> public static void setLob(java.sql.PreparedStatement ps, int arg,
> String val)
> throws java.sql.SQLException { ps.setClob(arg,putclob(val)); };
> //
> ------------------------------------------------------------------------
> public static String clean_string(String x) {
> return
> x.replaceAll("[\0\r\\\\]","").replaceAll("'","\\\"").replaceAll(",+",",");
> };
> //
> ------------------------------------------------------------------------
> public static String make_string(int digits) {
> double dl = (Math.random()) *
> (Math.pow(10.0,digits*Math.random()));
> int len = (int) dl;
> byte buf[] = new byte[len];
> while (len>0) {
> double db = 256*Math.random();
> buf[--len] = (byte)db;
> };
> return clean_string(new String(buf));
> };
> //
> ------------------------------------------------------------------------
> public static void update(java.sql.Connection c, String cmd)
> throws java.sql.SQLException {
> c.createStatement().execute(cmd);
> };
> //
> ------------------------------------------------------------------------
> public static final int entries=100000;
> public static void fill_db(java.sql.Connection c)
> throws java.sql.SQLException {
> try { update(c,"drop table mail_raw"); } catch (Exception e) {};
> try { update(c,"create table mail_raw ( msg varchar(999), att
> varchar(100), val clob )"); }
> catch (Exception e) { log_stacktrace(e); };
> java.sql.PreparedStatement pstmt = null;
> try { pstmt = c.prepareStatement("insert into mail_raw values (
> ?, ?, ? )"); }
> catch (Exception e) { log_stacktrace(e); };
> for (int i=0; i<entries; i++) {
> pstmt.setString(1,make_string(3));
> pstmt.setString(2,"5 body");
> setLob(pstmt,3,make_string(4));
> pstmt.executeUpdate();
> if (i%100==0) log("step "+i+"/"+entries);
> };
> };
> //
> ------------------------------------------------------------------------
> public static void dump_db(java.sql.Connection c)
> throws java.sql.SQLException {
> log("performing dump.");
> java.sql.ResultSet rs =
> c.createStatement().executeQuery("select * from mail_raw");
> while (rs.next()) {
> String msg = rs.getString(1);
> String att = rs.getString(2);
> String val = getLob(rs,3);
> };
> };
> //
> ------------------------------------------------------------------------
> public static void main(String args[]) {
> start_server();
> try {
> java.sql.Connection c = con();
> fill_db(c);
> dump_db(c);
> } catch (Exception e) { log_stacktrace(e); };
> };
> //
> ------------------------------------------------------------------------
> };
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