XMemcached network layout exception: java.lang.OutOfMemoryError: Direct buffer memory

[sfxnmadu]

Hello,
We use memcached v2.4.6, and are currently getting the below error:

09-06-2020 09:36:34,934 ERROR MemcachedHandler:128 - XMemcached network layout exception: java.lang.OutOfMemoryError: Direct buffer memory
at java.nio.Bits.reserveMemory(Bits.java:694)
at java.nio.DirectByteBuffer.(DirectByteBuffer.java:123)
at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311)
at sun.nio.ch.Util.getTemporaryDirectBuffer(Util.java:241)
at sun.nio.ch.IOUtil.read(IOUtil.java:195)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
at com.google.code.yanf4j.nio.impl.NioTCPSession.readFromBuffer(NioTCPSession.java:190)
at com.google.code.yanf4j.nio.impl.AbstractNioSession.onRead(AbstractNioSession.java:184)
at com.google.code.yanf4j.nio.impl.AbstractNioSession.onEvent(AbstractNioSession.java:324)
at com.google.code.yanf4j.nio.impl.SocketChannelController.dispatchReadEvent(SocketChannelController.java:54)
at com.google.code.yanf4j.nio.impl.NioController.onRead(NioController.java:150)
at com.google.code.yanf4j.nio.impl.Reactor.dispatchEvent(Reactor.java:310)
at com.google.code.yanf4j.nio.impl.Reactor.run(Reactor.java:177)

I reckon this might be similar to the issue in raised here, but I will appreciate specific insights on how to address this problem for this type of OOME - Direct buffer memory. And yes, we do use the xmemcached client as a singleton instance.

Thank you

[killme2008]

It seems that you may have too many connections ,every connection will keep an read direct buffer. You can increase the max direct buffer size or decrease the connection pool size.