java.lang.NoSuchMethodError: java.nio.ByteBuffer.clear

[vladp]

Hello
I started getting this run time error all of a sudden (I upgraded to 0.6.2), but kept java version unchanged.

Not sure at this point if the problem on my side or in lmdbjava.
I am storing images in the database, not text. The error seems to be coming when I am retreiving an image.

implementation group: 'org.lmdbjava', name: 'lmdbjava', version: '0.6.2'

java version "1.8.0_152"
Java(TM) SE Runtime Environment (build 1.8.0_152-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.152-b16, mixed mode)

java.lang.NoSuchMethodError: java.nio.ByteBuffer.clear()Ljava/nio/ByteBuffer;
	at org.lmdbjava.ByteBufferProxy$UnsafeProxy.out(ByteBufferProxy.java:297)
	at org.lmdbjava.ByteBufferProxy$UnsafeProxy.out(ByteBufferProxy.java:260)
	at org.lmdbjava.KeyVal.valOut(KeyVal.java:133)
	at org.lmdbjava.Dbi.get(Dbi.java:239)

My code invoking Dbi.get is this

    public static ByteBuffer getContent_impl_lmdb(final String itemKey,
                                             org.lmdbjava.Env env,
                                             Dbi<ByteBuffer> db ) throws IOException
    {
        if (env==null) { return null;}
        final ByteBuffer key = allocateDirect(env.getMaxKeySize());
        key.put(itemKey.getBytes(StandardCharsets.UTF_8))
                .flip();

        try (Txn<ByteBuffer> txn = env.txnRead()) {
            final ByteBuffer found = db.get(txn, key);
            if (found!= null) {
                // The fetchedVal is read-only and points to LMDB memory
                final ByteBuffer fetchedVal = txn.val();
                final ByteBufferBackedInputStream bo= new ByteBufferBackedInputStream(fetchedVal);
                ByteBuffer holdData= allocate(fetchedVal.remaining());
                int bytesRead=bo.read(holdData.array(), 0, fetchedVal.remaining());

                return holdData;
            }
            else {
                return null;
            }
        }
        catch (Exception ex) {
            logger.error("getContent_impl_lmdb ERROR: "+ex.toString());
            throw ex;
        }
        catch (OutOfMemoryError e) {
            final int MEGABYTE = (1024*1024);
            MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
            MemoryUsage heapUsage = memoryBean.getHeapMemoryUsage();
            long maxMemory = heapUsage.getMax() / MEGABYTE;
            long usedMemory = heapUsage.getUsed() / MEGABYTE;
            logger.error( "getContent_impl_lmdb:: Out of Memory Error : Memory Use :" + usedMemory + "M/" + maxMemory + "M");
            throw e;
        }
    } /*end of getContent_impl_lmdb */

I have not tried to re created consistenly. I am using lmdb for caching.
So I just removed my lmdb database to force my application force random caching again.
and at this point, I have not encountered the run time error again, but I only stressed the system
very slightly.

[benalexau]

Duplicate of #116