java.lang.IndexOutOfBoundsException

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Thrown to indicate that an index of some sort (such as to an array, to a string, or to a vector) is out of range. Applications can subclass this class to indicate similar exceptions.


rafael

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  • 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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    • java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at java.util.ArrayList.RangeCheck(ArrayList.java:572) at java.util.ArrayList.get(ArrayList.java:347) at org.apache.derby.client.net.NetCursor.findExtdtaData(NetCursor.java:1049) at org.apache.derby.client.net.NetCursor.getClobColumn_(NetCursor.java:1122) at org.apache.derby.client.am.Cursor.getClob(Cursor.java:1187) at org.apache.derby.client.am.ResultSet.getClob(ResultSet.java:1259) at error.getLob(error.java:97) at error.dump_db(error.java:161) at error.main(error.java:172)

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