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http://issues.apache.org/bugzilla/show_bug.cgi?id=38583 Summary: <cvschangelog> hangs Product: Ant Version: 1.6.2 Platform: Other OS/Version: other Status: NEW Severity: normal Priority: P2 Component: Core tasks AssignedTo: dev@ant.apache.org ReportedBy: [EMAIL PROTECTED] If someone uses a line like '--------------------' in the commit message, it confuses the CVSChangelogParser, and it eventually throws an IllegalStateException from the processGetPreviousRevision method. Since this parser is receiving an output of a running CVS process, this exception is propagated up and eventually hit the StreamPumper.run method, and caught by its exception block. The pump thread eventually exits, but when it does so it leaves the InputStream open. So now no one is draining the pipe. CVS, since it doesn't know that no one is draining the pipe, continues to fill in the pipe with more output. Eventually, the pipe fills up (at the OS level), and OS blocks the CVS process until this pipe is drained. But like I mentioned, no one is draining this pipe, so it blocks forever. Ant is blocking on the completion of this CVS process, so as a whole this causes a deadlock. But I'm not exactly sure how to fix this. I first thought about just closing the input when something goes wrong: try { while ((length = is.read(buf)) > 0) { os.write(buf, 0, length); } } catch (Exception e) { is.close(); } finally { But the java.lang.Process doesn't say much about what happens if you close a stream when the other process is still writing it. Perhaps bits get ignored, perhaps it's not. Alternatively, StreamPumper can also just drain the input even if the write operation fails. try { while ((length = is.read(buf)) > 0) { os.write(buf, 0, length); } } catch (Exception e) { // drain the pipe anyway while ((length = is.read(buf)) > 0) ; } finally { In any case I hope this bug gets fixed soon. -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
