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POWriting CSV file: IOException: Stream closed
 

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    <p>My Grails app reads data from a database and write the data to a CSV file. Recently, it has been failing with the following error:</p> <pre><code>java.io.IOException: Stream closed at java.io.BufferedWriter.ensureOpen(BufferedWriter.java:98) at java.io.BufferedWriter.write(BufferedWriter.java:203) at java.io.Writer.write(Writer.java:140) at sun.reflect.GeneratedMethodAccessor1116.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) </code></pre> <p>The error happens when I do the following (writer.write(builder.toString()):</p> <pre><code>Writer writer String delimiter =',' Pattern p public CsvGenerator() { p = Pattern.compile(delimiter) } public CsvGenerator(String fullPath) { writer = openWriter(fullPath) p = Pattern.compile(delimiter) } public CsvGenerator(String fullPath, String delimiter) { writer = openWriter(fullPath) this.delimiter = delimiter p = Pattern.compile(this.delimiter) } protected Writer openWriter(String fullPath) { Writer writer = new BufferedWriter(new FileWriter(fullPath)) return writer } public void closeWriter() { if (writer !=null) { writer.close() } } public void writeLine(List&lt;Object&gt; entries) { log.info "${entries}" StringBuilder builder = new StringBuilder() entries.eachWithIndex { Object entry, int index -&gt; builder.append(entry ==null? '': stripChars(entry.toString())) //writer.write(entry ==null? '': stripChars(entry.toString())) if (index &lt; entries.size()-1) { builder.append(delimiter) //writer.write(delimiter) } } builder.append('\r\n') writer.write(builder.toString()) } private String stripChars(String s) { String result =s.trim() return p.matcher(s).replaceAll('') //result.replace(delimiter,'') } </code></pre> <p>I've read that the cause is the write has been closed between writes. Is that correct?</p>
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