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Thread: Error: java.lang.OutOfMemoryError: Java heap space

  1. #1

    Default Error: java.lang.OutOfMemoryError: Java heap space

    Hello,

    This bug has bitten our server some times last 30 days. Any idea what could be causing this?

    Wowza Media Server 3.1.2.16 build3037
    OS - Ubuntu 12.04
    RAM - 16 Gb
    CPU - Intel E3-1230V2 (Cores 4, Threads 8)

    Text of last error this morning

    java.lang.OutOfMemoryError: Java heap space
    at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57)
    at java.nio.ByteBuffer.allocate(ByteBuffer.java:331)
    at org.apache.mina.common.SimpleByteBufferAllocator.allocate(Unknown Source)
    at org.apache.mina.common.ByteBuffer.allocate(Unknown Source)
    at org.apache.mina.transport.socket.nio.SocketIoProcessor.read(Unknown Source)
    at org.apache.mina.transport.socket.nio.SocketIoProcessor.process(Unknown Source)
    at org.apache.mina.transport.socket.nio.SocketIoProcessor.access$600(Unknown Source)
    at org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(Unknown Source)
    at org.apache.mina.util.NamePreservingRunnable.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:722)
    WARN server comment 2013-05-13 04:20:09 - - - - - 585159.535 - - - - - - - - Unexpected exception.
    java.lang.OutOfMemoryError: Java heap space
    WARN server comment 2013-05-13 04:21:40 - - - - - 585250.66 - - - - - - - - Unexpected exception.
    java.lang.OutOfMemoryError: Java heap space
    WARN server comment 2013-05-13 04:23:04 - - - - - 585351.49 - - - - - - - - nullUnexpected exception from exceptionCaught handler.
    java.lang.OutOfMemoryError: Java heap space
    WARN server comment 2013-05-13 04:24:03 - - - - - 585396.621 - - - - - - - - Unexpected exception.
    java.lang.OutOfMemoryError: Java heap space
    WARN server comment 2013-05-13 04:23:42 - - - - - 585377.031 - - - - - - - - nullUnexpected exception from exceptionCaught handler.
    java.lang.NullPointerException

    [install-dir]/bin/setenv.bat


    _EXECJAVA=java
    JAVA_OPTS="-Xmx8000M"

    # Uncomment to run server environment (faster), Note: will only work if server VM install, comes with JDL
    JAVA_OPTS="$JAVA_OPTS -server"

    # Can be a better GC setting to avoid long pauses
    JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewSize=512m"

    # Uncomment to log debug garbage collection information
    #NOW=$(date +"%Y-%m-%d-%H-%M")
    JAVA_OPTS="$JAVA_OPTS -verbose:gc -Xloggc:"/usr/local/WowzaMediaServer/logs/gc_$NOW.log" -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC"

    # Uncomment to write heap dump on OutOfMemoryError
    #JAVA_OPTS="$JAVA_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/WowzaMediaServer"

    # Uncomment to force Java to use specific language settings
    #JAVA_OPTS="$JAVA_OPTS -Duser.language=en -Duser.country=US -Dfile.encoding=Cp1252"

    # Uncomment to fix multicast crosstalk problem when streams share multicast port
    JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true"

    WMSAPP_HOME=/usr/local/WowzaMediaServer
    WMSCONFIG_HOME=/usr/local/WowzaMediaServer
    WMSCONFIG_URL=

    export WMSAPP_HOME WMSCONFIG_HOME JAVA_OPTS _EXECJAVA

    [install-dir]/conf/VHost.xml


    <Root>
    	<VHost>
    		<HostPortList>
    			<HostPort>
    				<ProcessorCount>4</ProcessorCount>
    				<IpAddress>*</IpAddress>
    				<!-- Separate multiple ports with commas -->
    				<!-- 80: HTTP, RTMPT -->
    				<!-- 554: RTSP -->
    				<Port>1935</Port>
    				<SocketConfiguration>
    					<ReuseAddress>true</ReuseAddress>
    					<!-- suggested settings for video on demand applications -->
    					<ReceiveBufferSize>65000</ReceiveBufferSize>
    					<SendBufferSize>65000</SendBufferSize>
    					<!-- suggest settings for low latency chat and video recording applications
    					<ReceiveBufferSize>32000</ReceiveBufferSize>
    					<SendBufferSize>32000</SendBufferSize>
    					-->
    					<KeepAlive>true</KeepAlive>
    					<!-- <TrafficClass>0</TrafficClass> -->
    					<!-- <OobInline>false</OobInline> -->
    					<!-- <SoLingerTime>-1</SoLingerTime> -->
    					<!-- <TcpNoDelay>false</TcpNoDelay> -->
    					<AcceptorBackLog>100</AcceptorBackLog>
    				</SocketConfiguration>
    				<HTTPStreamerAdapterIDs>cupertinostreaming,smoothstreaming,sanjosestreaming,dvrchunkstreaming</HTTPStreamerAdapterIDs>
    				<HTTPProviders>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPCrossdomain</BaseClass>
    						<RequestFilters>*crossdomain.xml</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPClientAccessPolicy</BaseClass>
    						<RequestFilters>*clientaccesspolicy.xml</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPProviderMediaList</BaseClass>
    						<RequestFilters>*jwplayer.rss|*jwplayer.smil|*medialist.smil|*manifest-rtmp.f4m</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPServerVersion</BaseClass>
    						<RequestFilters>*</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    				</HTTPProviders>
    			</HostPort>
    			
    			<!-- 443 with SSL -->
    			<!--
    			<HostPort>
    				<ProcessorCount>4</ProcessorCount>
    				<IpAddress>*</IpAddress>
    				<Port>443</Port>
    				<SSLConfig>
    					<KeyStorePath>${com.wowza.wms.context.VHostConfigHome}/conf/keystore.cert</KeyStorePath>
    					<KeyStorePassword>[password]</KeyStorePassword>
    					<KeyStoreType>JKS</KeyStoreType>
    					<SSLProtocol>TLS</SSLProtocol>
    					<Algorithm>SunX509</Algorithm>
    					<CipherSuites></CipherSuites>
    					<Protocols></Protocols>
    				</SSLConfig>
    				<SocketConfiguration>
    					<ReuseAddress>true</ReuseAddress>
    					<ReceiveBufferSize>24000</ReceiveBufferSize>
    					<SendBufferSize>65000</SendBufferSize>
    					<KeepAlive>true</KeepAlive>
    					<AcceptorBackLog>100</AcceptorBackLog>
    				</SocketConfiguration>
    				<HTTPStreamerAdapterIDs>cupertinostreaming,smoothstreaming,sanjosestreaming,dvrchunkstreaming</HTTPStreamerAdapterIDs>
    				<HTTPProviders>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPCrossdomain</BaseClass>
    						<RequestFilters>*crossdomain.xml</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPClientAccessPolicy</BaseClass>
    						<RequestFilters>*clientaccesspolicy.xml</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPProviderMediaList</BaseClass>
    						<RequestFilters>*jwplayer.rss|*jwplayer.smil|*medialist.smil|*manifest-rtmp.f4m</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPServerVersion</BaseClass>
    						<RequestFilters>*</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    				</HTTPProviders>
    			</HostPort>
    			-->
    			
    			<!-- Admin HostPort -->
    			<HostPort>
    				<ProcessorCount>1</ProcessorCount>
    				<IpAddress>*</IpAddress>
    				<Port>8086</Port>
    				<SocketConfiguration>
    					<ReuseAddress>true</ReuseAddress>
    					<ReceiveBufferSize>16000</ReceiveBufferSize>
    					<SendBufferSize>16000</SendBufferSize>
    					<KeepAlive>true</KeepAlive>
    					<AcceptorBackLog>100</AcceptorBackLog>
    				</SocketConfiguration>
    				<HTTPStreamerAdapterIDs></HTTPStreamerAdapterIDs>
    				<HTTPProviders>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.streammanager.HTTPStreamManager</BaseClass>
    						<RequestFilters>streammanager*</RequestFilters>
    						<AuthenticationMethod>admin-digest</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPServerInfoXML</BaseClass>
    						<RequestFilters>serverinfo*</RequestFilters>
    						<AuthenticationMethod>admin-digest</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPConnectionInfo</BaseClass>
    						<RequestFilters>connectioninfo*</RequestFilters>
    						<AuthenticationMethod>admin-digest</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPConnectionCountsXML</BaseClass>
    						<RequestFilters>connectioncounts*</RequestFilters>
    						<AuthenticationMethod>admin-digest</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.transcoder.httpprovider.HTTPTranscoderThumbnail</BaseClass>
    						<RequestFilters>transcoderthumbnail*</RequestFilters>
    						<AuthenticationMethod>admin-digest</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPProviderMediaList</BaseClass>
    						<RequestFilters>medialist*</RequestFilters>
    						<AuthenticationMethod>admin-digest</AuthenticationMethod>
    					</HTTPProvider>
    					<HTTPProvider>
    						<BaseClass>com.wowza.wms.http.HTTPServerVersion</BaseClass>
    						<RequestFilters>*</RequestFilters>
    						<AuthenticationMethod>none</AuthenticationMethod>
    					</HTTPProvider>
    				</HTTPProviders>
    			</HostPort>
    		
    		</HostPortList>
    		
    		<HTTPStreamerAdapters>
    			<HTTPStreamerAdapter>
    				<ID>smoothstreaming</ID>
    				<Name>smoothstreaming</Name>
    				<Properties>
    				</Properties>
    			</HTTPStreamerAdapter>
    			<HTTPStreamerAdapter>
    				<ID>cupertinostreaming</ID>
    				<Name>cupertinostreaming</Name>
    				<Properties>
    				</Properties>
    			</HTTPStreamerAdapter>
    			<HTTPStreamerAdapter>
    				<ID>sanjosestreaming</ID>
    				<Name>sanjosestreaming</Name>
    				<Properties>
    				</Properties>
    			</HTTPStreamerAdapter>
    			<HTTPStreamerAdapter>
    				<ID>dvrchunkstreaming</ID>
    				<Name>dvrchunkstreaming</Name>
    				<Properties>
    				</Properties>
    			</HTTPStreamerAdapter>
    		</HTTPStreamerAdapters>
    
    		<HandlerThreadPool>
    			<PoolSize>120</PoolSize>
    		</HandlerThreadPool>
    		<TransportThreadPool>
    			<PoolSize>80</PoolSize>
    		</TransportThreadPool>
    		<IdleWorkers>
    			<WorkerCount>4</WorkerCount>
    			<CheckFrequency>50</CheckFrequency>
    			<MinimumWaitTime>5</MinimumWaitTime>
    		</IdleWorkers>
    		<NetConnections>
    			<ProcessorCount>4</ProcessorCount>
    			<IdleFrequency>250</IdleFrequency>
    			<SocketConfiguration>
    				<ReuseAddress>true</ReuseAddress>
    				<ReceiveBufferSize>65000</ReceiveBufferSize>
    				<SendBufferSize>24000</SendBufferSize>
    				<KeepAlive>true</KeepAlive>
    				<!-- <TrafficClass>0</TrafficClass> -->
    				<!-- <OobInline>false</OobInline> -->
    				<!-- <SoLingerTime>-1</SoLingerTime> -->
    				<!-- <TcpNoDelay>false</TcpNoDelay> -->
    				<AcceptorBackLog>100</AcceptorBackLog>
    			</SocketConfiguration>
    		</NetConnections>
    		<HTTPTunnel>
    			<KeepAliveTimeout>2000</KeepAliveTimeout>
    		</HTTPTunnel>
    		<Client>
    			<ClientTimeout>90000</ClientTimeout>
    			<IdleFrequency>250</IdleFrequency>
    		</Client>
    		<!-- RTP/Authentication/Methods defined in Authentication.xml. Default setup includes; none, basic, digest -->
    		<RTP>
    			<IdleFrequency>75</IdleFrequency>
    			<DatagramConfiguration>
    				<Incoming>
    					<ReuseAddress>true</ReuseAddress>
    					<ReceiveBufferSize>1024000</ReceiveBufferSize>
    					<SendBufferSize>65000</SendBufferSize>
    					<!-- <MulticastBindToAddress>true</MulticastBindToAddress> -->
    					<!-- <MulticastInterfaceAddress>192.168.1.22</MulticastInterfaceAddress> -->
    					<!-- <TrafficClass>0</TrafficClass> -->
    					<MulticastTimeout>50</MulticastTimeout>
    					<DatagramMaximumPacketSize>4096</DatagramMaximumPacketSize>
    				</Incoming>
    				<Outgoing>
    					<ReuseAddress>true</ReuseAddress>
    					<ReceiveBufferSize>65000</ReceiveBufferSize>
    					<SendBufferSize>65000</SendBufferSize>
    					<!-- <MulticastBindToAddress>true</MulticastBindToAddress> -->
    					<!-- <MulticastInterfaceAddress>192.168.1.22</MulticastInterfaceAddress> -->
    					<!-- <TrafficClass>0</TrafficClass> -->
    					<MulticastTimeout>50</MulticastTimeout>
    					<DatagramMaximumPacketSize>4096</DatagramMaximumPacketSize>
    				</Outgoing>
    			</DatagramConfiguration>
    			<UnicastIncoming>
    				<ProcessorCount>4</ProcessorCount>
    			</UnicastIncoming>
    			<UnicastOutgoing>
    				<ProcessorCount>8</ProcessorCount>
    			</UnicastOutgoing>
    			<MulticastIncoming>
    				<ProcessorCount>4</ProcessorCount>
    			</MulticastIncoming>
    			<MulticastOutgoing>
    				<ProcessorCount>4</ProcessorCount>
    			</MulticastOutgoing>
    		</RTP>
    		<Application>
    			<ApplicationTimeout>60000</ApplicationTimeout>
    			<PingTimeout>12000</PingTimeout>
    			<ValidationFrequency>20000</ValidationFrequency>
    			<MaximumPendingWriteBytes>0</MaximumPendingWriteBytes>
    			<MaximumSetBufferTime>60000</MaximumSetBufferTime>
    		</Application>
    		<StartStartupStreams>true</StartStartupStreams>
    		<!-- Properties defined here will be added to the IVHost.getProperties() collection -->
    		<Properties>
    		</Properties>
    	</VHost>
    </Root>

    [install-dir]/bin/wms.sh


    ulimit -n 20000


    [install-dir]/bin/startup.sh


    ulimit -n 20000 > /dev/null 2>&1


    /etc/sysctl.conf


    fs.file-max=20000


    Thanks!
    Last edited by roger_l; 05-20-2013 at 03:25 PM.

  2. #2

    Default

    java version "1.7.0_15"
    OpenJDK 64-bit Server VM (build 23.7-b01, mixed mode)

  3. #3

    Default

    Hi,

    Your server is not tuned. You have allocated more memory but thats about it. Please see the tuning guide here

    http://www.wowza.com/forums/content....general-tuning

    I would also recommend upgrading to 3.5.2 to make sure any fixes from the version you are running are available to you.

    Andrew.

  4. #4

    Default

    Hello!

    Quote Originally Posted by andrew_k View Post
    Your server is not tuned. You have allocated more memory but thats about it. Please see the tuning guide here
    http://www.wowza.com/forums/content....general-tuning
    We've tuned Wowza according to this guide: http://www.wowza.com/forums/content....general-tuning

    There is the list of changes we've made:

    1. In Performance Tuning Guide:
    "It is generally best to run the most recent Sun Java JDK. It is best to run a 64-bit operating system with the 64-bit Java VM"

    Now in our server:

    java version "1.7.0_21"
    Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
    Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

    Ubuntu 12.10 (x86-64)

    2. In Performance Tuning Guide:
    "It is best to run the -server version of the Java VM"

    Now in our [install-dir]/bin/setenv.sh:

    JAVA_OPTS="$JAVA_OPTS -server"
    3. In Performance Tuning Guide:
    "If you are running the 64-bit version of the Java VM ... and have 16 GB or more RAM, we suggest a heap size of 8000 MB"

    Now in our [install-dir]/bin/setenv.sh:

    JAVA_OPTS="-Xmx8000M"
    4. In Performance Tuning Guide:
    "Garbage collection (GC) tuning in Java is a tricky subject. What works best in one server setup may not work in another. Through trial-and-error and customer feedback, we have several suggested approaches"

    So, we have 3 variants:

    variant a. "We strongly recommend No Additional Settings. The default -server tuning works quite well for many streaming situations, so in most cases this tuning works great without additional settings."

    variant b. "The Concurrent Collector":
    JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewSize=512m"

    variant c. "Experimental: Garbage-First garbage collector (G1)":
    JAVA_OPTS="$JAVA_OPTS -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC"

    Now using variant b:

    In our [install-dir]/bin/setenv.sh:
    JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewSize=512m"
    5. In Performance Tuning Guide:
    "For low-latency chat applications, it is best to use smaller socket buffer sizes (16000 bytes for read and write)"

    Now in our [install-dir]/conf/VHost.xml:

    <Root>
    <VHost>
    <HostPortList>
    <SocketConfiguration>
    <!-- suggest settings for low latency chat and video recording applications -->
    <ReceiveBufferSize>16000</ReceiveBufferSize>
    <SendBufferSize>16000</SendBufferSize>
    </SocketConfiguration>
    </HostPortList>
    </VHost>
    </Root>
    6. In Performance Tuning Guide:
    "On Linux, increase the maximum number of file descriptors."

    Now in our [install-dir]/bin/wms.sh:

    ulimit -n 20000
    Now in our [install-dir]/bin/startup.sh:

    ulimit -n 20000 > /dev/null 2>&1
    "On some versions of Linux, there is also a limit in the kernel that may need to be increased."

    Now in our /etc/sysctl.conf:

    fs.file-max=20000
    7. In Performance Tuning Guide:
    "On Linux, switch to using the Anticipatory elevator (as) elevator algorithm."

    Haven't do it.

    8. In Performance Tuning Guide:
    "On Linux, mount your disk with the noatime option"

    Done.

    9. In Performance Tuning Guide:
    "The [total-core-count] refers to the total number of CPU cores in your server... If your server supports hyper-threading, then use the total number of threads. In the above example, if hyper-threading is available, then the total number of threads is: 2 (processor) x 4 (cores) x 2 (threads per core) = 16"

    Now our CPU is Intel E3-1230V2 (1 processor x 4 cores х 8 threads per core)

    Now in our [install-dir]/conf/VHost.xml:

    <Root>
    <VHost>
    <HostPortList>
    <HostPort>
    <ProcessorCount>16</ProcessorCount>
    </HostPort>

    <!-- Admin HostPort -->
    <HostPort>
    <ProcessorCount>1</ProcessorCount>
    </HostPort>

    </HostPortList>

    <HandlerThreadPool>
    <PoolSize>480</PoolSize>
    </HandlerThreadPool>
    <TransportThreadPool>
    <PoolSize>320</PoolSize>
    </TransportThreadPool>

    <NetConnections>
    <ProcessorCount>16</ProcessorCount>
    </NetConnections>

    <!-- RTP/Authentication/Methods defined in Authentication.xml. Default setup includes; none, basic, digest -->
    <RTP>
    <UnicastIncoming>
    <ProcessorCount>8</ProcessorCount>
    </UnicastIncoming>
    <UnicastOutgoing>
    <ProcessorCount>16</ProcessorCount>
    </UnicastOutgoing>
    <MulticastIncoming>
    <ProcessorCount>8</ProcessorCount>
    </MulticastIncoming>
    <MulticastOutgoing>
    <ProcessorCount>8</ProcessorCount>
    </MulticastOutgoing>
    </RTP>
    </VHost>
    </Root>
    10. In Performance Tuning Guide:
    "Running Multiple Virtual Hosts:"

    We don't use it.

    11. In Performance Tuning Guide:
    "If you are not doing low latency streaming..."

    We've done it already in step 5.

    12. In Performance Tuning Guide:
    "If you are having problems with multiple incoming multicast streams interfering with each other on Linux you may need to set the Java property java.net.preferIPv4Stack to true"

    Now in our [install-dir]/bin/setenv.sh:
    JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true"
    What settings we have change to get rid of "OutOfMemory" error?

    Note:
    When we using variant a from step 4, the bug has bitten our server each ~6 hours. We have dump ~6Gb which can send to your support.
    When we using variant b from step 4, the bug has bitten our server each ~7 days.

    We can also send to you archives with our logs, conf, heap dump and else useful data to solve this problem.

    Quote Originally Posted by andrew_k View Post
    I would also recommend upgrading to 3.5.2 to make sure any fixes from the version you are running are available to you.
    We've tried 3.5.2.05 but got similar error each ~6 hours, so we rolled away to 3.1.2.

    Thanks!
    Last edited by Denis_Ukraine; 05-20-2013 at 03:27 PM.

  5. #5

    Default

    Today we've removed

    java version "1.7.0_15" OpenJDK 64-bit Server VM (build 23.7-b01, mixed mode)

    and installed

    java version "1.7.0_21"
    Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
    Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

  6. #6

    Default

    Hi Denis,

    Can you please upload the heap dump to somewhere that we can download it and then open ticket at support@wowza.com with a link to the download.

    Please also zip up your conf folder and recent logs and also include a reference to this forum post.

    Roger.

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