storage has invalid header?

[Reinhard Schwab]

Hello,

I am new to MapDB and I have experienced one problem, when I try to open a db.

The stacktrace is

Exception in thread "main" java.io.IOError: java.io.IOException: storage has invalid header

at org.mapdb.StoreDirect.checkHeaders(StoreDirect.java:212)

at org.mapdb.StoreDirect.<init>(StoreDirect.java:197)

at org.mapdb.DBMaker.extendStoreDirect(DBMaker.java:800)

at org.mapdb.DBMaker.makeEngine(DBMaker.java:663)

at org.mapdb.DBMaker.make(DBMaker.java:631)

at kg.wikipedia.TestMapDB.getDB(TestMapDB.java:34)

at kg.wikipedia.TestMapDB.test1(TestMapDB.java:68)

at kg.wikipedia.TestMapDB.main(TestMapDB.java:107)

Caused by: java.io.IOException: storage has invalid header

... 8 more

The version of MapDB is 0.9.4.

I have transactions disabled, and I close the db before shutdown of the JVM by calling db.close().

This is how I get a db instance 

public DB getDB(File dbPath, boolean readonly) {

DBMaker<?> dbMaker = DBMaker.newFileDB(dbPath);

dbMaker = dbMaker.transactionDisable();

dbMaker = dbMaker.closeOnJvmShutdown();

if (readonly) {

// NOTE: i don't need transactions, disabling should improve speed

// db = DBMaker.newFileDB(dbPath).transactionDisable()

// .closeOnJvmShutdown().readOnly().make();

dbMaker = dbMaker.readOnly();

}

db = dbMaker.make();

return db;

}

If I enable transactions, I dont see the problem.

Best regards

Reinhard

[Igor Castang]

Hello I would strongly advice to work with at least the last stable version :

http://mvnrepository.com/artifact/org.mapdb/mapdb/1.0.8

regards

[Reinhard Schwab]

Hello I have now upgraded to 0.9.5 and it looks like the problem has gone. I will upgrade to 1.0.8 later...

thanks