Dne pátek 2. října 2015 8:43:32 UTC+2 Thomas Mueller napsal(a): > > The problem was that entries were removed that are still needed, due to a > bug elsewhere (LobStorageMap I think). That caused getMaxBlockKey to be > called with r == null. > > I understand existing databases, where the entries are already missing, > will still result in an exception, if with this bug fixed. So a new > database (or a backup of an old database) is needed. >
OK. I am looking forward to next release then. Thank you. > > Regards, > Thomas > > > On Thu, Oct 1, 2015 at 9:36 AM, Václav Haisman <[email protected] > <javascript:>> wrote: > > Dne čtvrtek 1. října 2015 8:32:37 UTC+2 Thomas Mueller napsal(a): > > Hi, > > I believe this is now fixed in the trunk, see > https://github.com/h2database/h2database/commit/b8a04500a5aec9a951011cddd43b660fb1ca7746 > > I do not think this fixes the issue. The recursive getMaxBlockKey(r) > still gets called with r == null, AFAICS. > > > Regards, > Thomas > > > On Wed, Sep 30, 2015 at 1:34 PM, Václav Haisman <[email protected]> wrote: > > Hi. > > We are experiencing occasional errors with this stack trace: > > Caused by: org.h2.jdbc.JdbcSQLException: General error: > "java.lang.NullPointerException" [50000-189] > at org.h2.message.DbException.getJdbcSQLException(DbException.java:345) > at org.h2.message.DbException.get(DbException.java:168) > at org.h2.message.DbException.convert(DbException.java:295) > at org.h2.engine.Database.openDatabase(Database.java:300) > at org.h2.engine.Database.<init>(Database.java:263) > at org.h2.engine.Engine.openSession(Engine.java:65) > at org.h2.engine.Engine.openSession(Engine.java:175) > at org.h2.engine.Engine.createSessionAndValidate(Engine.java:153) > at org.h2.engine.Engine.createSession(Engine.java:136) > at org.h2.engine.Engine.createSession(Engine.java:28) > at > org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:349) > at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:107) > at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:91) > at org.h2.Driver.connect(Driver.java:72) > at > org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) > at > org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) > at > org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556) > at > org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545) > ... 68 more > Caused by: java.lang.NullPointerException > > at java.nio.ByteBuffer.wrap(Unknown Source) > at org.h2.mvstore.StreamStore.getMaxBlockKey(StreamStore.java:249) > at org.h2.mvstore.StreamStore.getMaxBlockKey(StreamStore.java:269) > at org.h2.store.LobStorageMap.init(LobStorageMap.java:114) > at org.h2.engine.Database.open(Database.java:767) > at org.h2.engine.Database.openDatabase(Database.java:269) > ... 82 more > > I have attached a debugger and looked around in getMaxBlockKey(): > > public long getMaxBlockKey(byte[] id) { > long maxKey = -1; > ByteBuffer idBuffer = ByteBuffer.wrap(id); > while (idBuffer.hasRemaining()) { > switch (idBuffer.get()) { > case 0: > // in-place: 0, len (int), data > int len = DataUtils.readVarInt(idBuffer); > idBuffer.position(idBuffer.position() + len); > break; > case 1: > // block: 1, len (int), blockId (long) > DataUtils.readVarInt(idBuffer); > long k = DataUtils.readVarLong(idBuffer); > maxKey = Math.max(maxKey, k); > break; > case 2: > // indirect: 2, total len (long), blockId (long) > DataUtils.readVarLong(idBuffer); > long k2 = DataUtils.readVarLong(idBuffer); > // recurse > byte[] r = map.get(k2); > maxKey = Math.max(maxKey, getMaxBlockKey(r)); > break; > default: > throw DataUtils.newIllegalArgumentException( > "Unsupported id {0}", Arrays.toString(id)); > } > } > return maxKey; > } > > It appears that the id argument is null in the recursive call from the > case 2 branch. > > Is this a known issue? Should I report elsewhere than this group? > > -- > VH > > -- > You received this message because you are subscribed to the Google Groups > "H2 Database" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/h2-database. > For more options, visit https://groups.google.com/d/optout. > > > ... -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
