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This bug was originally marked as duplicate of bug 183696, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.1.2 (Build 201204101705) VM: Java HotSpot(TM) Client VM, 1.6.0-b105, Java(TM) SE Runtime Environment, 1.6.0-b105 OS: Windows XP Stacktrace: java.util.zip.ZipException: invalid CEN header (bad signature) at java.util.zip.ZipFile.open(ZipFile.java:0) at java.util.zip.ZipFile.<init>(ZipFile.java:114) at java.util.jar.JarFile.<init>(JarFile.java:133) at java.util.jar.JarFile.<init>(JarFile.java:112) at org.netbeans.JarClassLoader$JarSource$1.call(JarClassLoader.java:499) at org.netbeans.JarClassLoader$JarSource$1.call(JarClassLoader.java:492)
Created attachment 121488 [details] stacktrace
The report http://statistics.netbeans.org/exceptions/messageslog?id=605669 signals temporary outage of file handles, but after retrying the JAR file got opened - at least it seems. Report http://statistics.netbeans.org/exceptions/messageslog?id=605215 did not succeed: INFO [org.netbeans.JarClassLoader]: file /usr/local/netbeans-7.1.1/java/modules/ext/maven/indexer-core-4.1.2.jar exists. # of retries 4 INFO [org.netbeans.JarClassLoader]: /usr/local/netbeans-7.1.1/java/modules/ext/maven/indexer-core-4.1.2.jar isDirectory: false, isFile: true INFO [org.netbeans.JarClassLoader]: Cannot open /usr/local/netbeans-7.1.1/java/modules/ext/maven/indexer-core-4.1.2.jar java.util.zip.ZipException: error in opening zip file at java.util.zip.ZipFile.open(Native Method) at java.util.zip.ZipFile.<init>(ZipFile.java:127) Anyway the reports are from 7.1.x. No report since then. Closing as worksforme.