We're seeing this as well. We were testing with a 40+ node cluster on the latest 0.6 branch from few days ago.
-Chris On Jun 3, 2010, at 9:55 PM, Lu Ming wrote: > > I have ten 0.5.1 Cassandra nodes in my cluster, and I update them to > cassandra to 0.6.2 yesterday. > But today I find six cassandra nodes have high CPU usage more than 400% in my > 8-core CPU sever. > The worst one is more than 760%. It is very serious. > > I use jvisualvm to watch the worst node, and I found that there are many > running threads named "thread-xxx" > the status of other threads is waiting and sleeping. > > "Thread-130" - Thread t...@240 > java.lang.Thread.State: RUNNABLE > at sun.misc.Unsafe.setMemory(Native Method) > at sun.nio.ch.Util.erase(Util.java:202) > at > sun.nio.ch.FileChannelImpl.transferFromArbitraryChannel(FileChannelImpl.java:560) > at sun.nio.ch.FileChannelImpl.transferFrom(FileChannelImpl.java:603) > at > org.apache.cassandra.streaming.IncomingStreamReader.read(IncomingStreamReader.java:62) > at > org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:66) > Locked ownable synchronizers: > - None > > "Thread-126" - Thread t...@236 > java.lang.Thread.State: RUNNABLE > at sun.nio.ch.FileDispatcher.read0(Native Method) > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21) > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:233) > at sun.nio.ch.IOUtil.read(IOUtil.java:200) > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:236) > - locked java.lang.obj...@10808561 > at > sun.nio.ch.FileChannelImpl.transferFromArbitraryChannel(FileChannelImpl.java:565) > at sun.nio.ch.FileChannelImpl.transferFrom(FileChannelImpl.java:603) > at > org.apache.cassandra.streaming.IncomingStreamReader.read(IncomingStreamReader.java:62) > at > org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:66) > > Locked ownable synchronizers: > - None > > "Thread-119" - Thread t...@229 > java.lang.Thread.State: RUNNABLE > at sun.nio.ch.NativeThread.current(Native Method) > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:182) > - locked java.lang.obj...@65b4abbd > - locked java.lang.obj...@38773975 > at > sun.nio.ch.FileChannelImpl.transferFromArbitraryChannel(FileChannelImpl.java:565) > at sun.nio.ch.FileChannelImpl.transferFrom(FileChannelImpl.java:603) > at > org.apache.cassandra.streaming.IncomingStreamReader.read(IncomingStreamReader.java:62) > at > org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:66) > > Locked ownable synchronizers: > - None > >
