OutOfMemory error? - Githubissues

I am running the supernode as slave and got the following error today:

113310 [INFO] BitcoinPeer Peer-thread-1 Connection to '/Satoshi:0.8.3/' [70001] at localhost/127.0.0.1:8333 Open connections: 1
Exception in thread "Peer selector" java.lang.OutOfMemoryError: Java heap space
    at com.bitsofproof.supernode.core.P2P$Peer.process(P2P.java:196)
    at com.bitsofproof.supernode.core.P2P$Peer.access$1700(P2P.java:55)
    at com.bitsofproof.supernode.core.P2P$1.run(P2P.java:624)
    at java.lang.Thread.run(Thread.java:724)
Exception in thread "Peer-thread-0" java.lang.OutOfMemoryError: Java heap space
    at com.google.protobuf.ByteString.copyFrom(ByteString.java:92)
    at com.google.protobuf.CodedInputStream.readBytes(CodedInputStream.java:289)
    at com.bitsofproof.supernode.model.LevelDBStore$TX$TXOUT$Builder.mergeFrom(LevelDBStore.java:1152)
    at com.bitsofproof.supernode.model.LevelDBStore$TX$TXOUT$Builder.mergeFrom(LevelDBStore.java:954)
    at com.google.protobuf.CodedInputStream.readMessage(CodedInputStream.java:275)
    at com.bitsofproof.supernode.model.LevelDBStore$TX$Builder.mergeFrom(LevelDBStore.java:1983)
    at com.bitsofproof.supernode.model.LevelDBStore$TX$Builder.mergeFrom(LevelDBStore.java:1654)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:300)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:238)
    at com.google.protobuf.AbstractMessageLite$Builder.mergeFrom(AbstractMessageLite.java:162)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:716)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:238)
    at com.google.protobuf.AbstractMessageLite$Builder.mergeFrom(AbstractMessageLite.java:153)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:709)
    at com.bitsofproof.supernode.model.LevelDBStore$TX.parseFrom(LevelDBStore.java:1588)
    at com.bitsofproof.supernode.model.Tx.fromLevelDB(Tx.java:152)
    at com.bitsofproof.supernode.model.LvlStore.readTx(LvlStore.java:70)
    at com.bitsofproof.supernode.model.LvlStore.findTxOuts(LvlStore.java:377)
    at com.bitsofproof.supernode.core.CachedBlockStore.resolveInputsUsingDB(CachedBlockStore.java:1364)
    at com.bitsofproof.supernode.core.CachedBlockStore.resolveInputs(CachedBlockStore.java:1328)
    at com.bitsofproof.supernode.core.CachedBlockStore.validateTransaction(CachedBlockStore.java:1699)
    at com.bitsofproof.supernode.core.TxHandler$7$1.doInTransaction(TxHandler.java:233)
    at com.bitsofproof.supernode.core.TxHandler$7$1.doInTransaction(TxHandler.java:223)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:130)
    at com.bitsofproof.supernode.core.TxHandler$7.run(TxHandler.java:222)
    at com.bitsofproof.supernode.core.CachedBlockStore.runInCacheContext(CachedBlockStore.java:125)
    at com.bitsofproof.supernode.core.TxHandler.validateCacheAndSend(TxHandler.java:213)
    at com.bitsofproof.supernode.core.TxHandler$5.process(TxHandler.java:183)
    at com.bitsofproof.supernode.core.TxHandler$5.process(TxHandler.java:176)
    at com.bitsofproof.supernode.core.BitcoinPeer.receive(BitcoinPeer.java:516)
    at com.bitsofproof.supernode.core.P2P$Peer$3.run(P2P.java:297)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

Should I simply increase heap space?

UPDATE:

I restarted it and it seems the blockchain download progress got to a point where it's having problems:

$ java -server -Xmx2g -jar server/target/bitsofproof-server-1.1.4.jar slave leveldb
0 [INFO] Main main bitsofproof supernode (c) 2013 bits of proof zrt.
660 [INFO] Main main Loading profile: slave
660 [INFO] Main main Loading profile: leveldb
3560 [WARN] JtaTransactionManager main No JTA TransactionManager found: transaction suspension not available
Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
    at java.io.ByteArrayOutputStream.<init>(ByteArrayOutputStream.java:77)
    at java.io.ByteArrayOutputStream.<init>(ByteArrayOutputStream.java:62)
    at org.bouncycastle.util.encoders.Hex.encode(Unknown Source)
    at org.bouncycastle.util.encoders.Hex.encode(Unknown Source)
    at com.bitsofproof.supernode.common.ByteUtils.toHex(ByteUtils.java:164)
    at com.bitsofproof.supernode.common.Hash.toString(Hash.java:118)
    at com.bitsofproof.supernode.model.Blk.fromLevelDB(Blk.java:111)
    at com.bitsofproof.supernode.model.LvlStore$1.process(LvlStore.java:178)
    at com.bitsofproof.supernode.model.LvlDiskStore.forAll(LvlDiskStore.java:182)
    at com.bitsofproof.supernode.model.LvlStore.cacheChain(LvlStore.java:170)
    at com.bitsofproof.supernode.core.CachedBlockStore.cache(CachedBlockStore.java:370)
    at com.bitsofproof.supernode.main.Supernode.start(Supernode.java:69)
    at com.bitsofproof.supernode.main.Main.main(Main.java:75)

I ran it now with 3 gigs, let's see what happens.

bitsofproof / supernode

OutOfMemory error? #44