Hi,
I began working with the con.getMetaData() object today and soon after began
getting the following:
org.jboss.deployment.DeploymentException: Too many open files; - nested
throwable: (java.io.IOException: Too many open files)
| at
org.jboss.web.AbstractWebContainer.init(AbstractWebContainer.java:352)
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:324)
| at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
| at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
| at
org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
| at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
| at
org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
| at
org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:80)
| at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
| at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
| at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
| at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
| at $Proxy31.init(Unknown Source)
| at org.jboss.deployment.MainDeployer.init(MainDeployer.java:843)
| at org.jboss.deployment.MainDeployer.init(MainDeployer.java:863)
| at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:780)
| at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
| at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)
| at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:324)
| at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
| at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
| at
org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
| at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
| at
org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
| at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
| at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
| at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
| at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
| at $Proxy9.deploy(Unknown Source)
| at
org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:319)
| at
org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:489)
| at
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:192)
| at
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:203)
| at
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:182)
| Caused by: java.io.IOException: Too many open files
| at java.io.FileInputStream.open(Native Method)
| at java.io.FileInputStream.<init>(FileInputStream.java:106)
| at
org.jboss.web.AbstractWebContainer.init(AbstractWebContainer.java:301)
| ... 37 more
Anyone know the cause?
Here's the code which causes the problem:
public DbTable getTable(String ds, String tbl) throws SQLException,
NamingException, LookupException{
| DbTable table = null;
| Connection con = null;
| ResultSet rs = null;
| DatabaseMetaData meta = null;
| String[] types = {"TABLE"};
| try {
| con = AppHelper.getConnection(ds);
| meta = con.getMetaData();
| rs = meta.getTables(con.getCatalog(), null,
"%"+tbl+"%", types);
| if(!rs.next()) {
| throw new LookupException("Unable to find
specified table:"+tbl);
| }
| String name;
| int count = 3;
| do {
| name = rs.getString(count);
| if(name.equals(tbl)) {
| table = new DbTable(name);
| readTableColumns(meta, table);
| break;
| }
| }while(rs.next());
| }finally {
| AppHelper.closeResultSet(rs);
| AppHelper.releaseConnection(con);
| }
| return table;
| }
|
| private void readTableColumns(DatabaseMetaData meta, DbTable table)
throws SQLException {
| logger.info("entering readTableColumns");
| ResultSet columns = meta.getColumns(null, "%",
table.getTableName(), "%");
| while (columns.next()) {
| String columnName = columns.getString("COLUMN_NAME");
| String datatype = columns.getString("TYPE_NAME");
| int datasize = columns.getInt("COLUMN_SIZE");
| int digits = columns.getInt("DECIMAL_DIGITS");
| int nullable = columns.getInt("NULLABLE");
|
| boolean isNull = (nullable == 1);
|
| DbColumn newColumn = new DbColumn(columnName, datatype,
datasize, digits, isNull);
| table.addColumn(newColumn);
| }
| logger.info("leaving readTableColumns");
| }
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