Cassandra Error Too Many Open Files
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recoveryData distribution and replicationConsistent hashingVirtual nodesData replicationPartitionersMurmur3PartitionerRandomPartitionerByteOrderedPartitionerSnitchesDynamic snitchingSimpleSnitchRackInferringSnitchPropertyFileSnitchGossipingPropertyFileSnitchEc2SnitchEc2MultiRegionSnitchGoogleCloudSnitchCloudstackSnitchClient requestsPlanning a cluster deploymentSelecting hardware for enterprise implementationsPlanning an Amazon EC2 clusterCalculating usable cassandra client too many open files disk capacityCalculating user data sizeAnti-patterns in CassandraInstallingInstalling the java too many open files RHEL-based packagesInstalling the Debian and Ubuntu packagesInstalling from the binary tarballInstalling DataStax Community on warning too many open files Windows systemsInstalling prior releases of DataStax CommunityUninstalling DataStax CommunityInstalling on cloud providersInstalling a Cassandra cluster on Amazon EC2Clearing the data for an socket error too many open files AMI restartInstalling and deploying a Cassandra cluster using GoGridInstalling the Oracle JDK and the JNAInstalling Oracle JDK on RHEL-based SystemsInstalling the JDK on Debian-based systemsInstalling the JNA on RHEL or CentOS SystemsInstalling the JNA on Debian or Ubuntu SystemsInstalling the JNA from the JAR fileRecommended
Utorrent Error Too Many Open Files
production settingsInitializing a clusterInitializing a multiple node cluster (single data center)Initializing a multiple node cluster (multiple data centers)SecuritySecuring CassandraSSL encryptionClient-to-node encryptionNode-to-node encryptionUsing cqlsh with SSL encryptionPreparing server certificatesInternal authenticationInternal authenticationConfiguring authenticationLogging in using cqlshInternal authorizationObject permissionsConfiguring internal authorizationConfiguring firewall port accessEnabling JMX authenticationDatabase internalsManaging dataSeparate table directoriesCassandra storage basicsThe write path to compactionHow Cassandra stores indexesAbout index updatesThe write path of an updateAbout deletesAbout hinted handoff writesAbout readsHow off-heap components affect readsReading from a partitionHow write patterns affect readsHow the row cache affects readsAbout transactions and concurrency controlLightweight transactionsAtomicityConsistencyIsolationDurabilityAbout data consistencyConfiguring data consistencyRead requestsWrite requestsConfigurationNode and cluster configurationConfiguring gossip settingsConfiguring the heap dump directoryGenerating tokensConfiguring virtual nodesEnabling virtual nodes on a new clusterEnabling virtual nodes on an existing production clusterLogging configurationLogging levelsChanging the rotation and size of the Cassandra output.logChanging the r
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Linux Error Too Many Open Files
of this site About Us Learn more about Stack Overflow the company accept error too many open files Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges error emfile too many open files Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a https://docs.datastax.com/en/cassandra/2.0/cassandra/troubleshooting/trblshootTooManyFiles_r.html minute: Sign up Cassandra Too Many Open Files . Port died up vote 1 down vote favorite one of the Cassandra 2.0 node crashed with "TOO many open files" message. currently we have set nofile limit to 32768 as specified in http://www.datastax.com/docs/1.0/install/recommended_settings. As we are still seeing the error should we increase it more? what is the production recommended value? any side http://stackoverflow.com/questions/26762142/cassandra-too-many-open-files-port-died effects of increase this nofile limit? what causes the open files to grow? Thanks in advance. unix cassandra nosql datastax share|improve this question asked Nov 5 '14 at 16:26 kotaru chakravarthy 305 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted You are looking at an old document. The current doc (for version 2.x) from DataStax Recommended Production Settings indicates that the nofile value should be set to 100,000. Packaged installs: Ensure that the following settings are included in the /etc/security/limits.d/cassandra.conf file: cassandra - memlock unlimited cassandra - nofile 100000 cassandra - nproc 32768 cassandra - as unlimited Tarball installs: Ensure that the following settings are included in the /etc/security/limits.conf file: * - memlock unlimited * - nofile 100000 * - nproc 32768 * - as unlimited If you run Cassandra as root, some Linux distributions such as Ubuntu, require setting the limits for root explicitly instead of using *: root - memlock unlimited root - nofile 100000 root - nproc 32768 root - as unlimited Try that, and see if it helps. share|improve this answer answered N
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the http://stackoverflow.com/questions/9049974/cassandra-too-many-open-files workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join too many them; it only takes a minute: Sign up cassandra too many open files up vote 0 down vote favorite 2 I used cassandra 0.6.5 on two-node (A and B) cluster. Hector is used in Client side. One node A always has too many open files exception after running some time. I run netstat on the node. It shows a too many open lot of CLOSE_WAIT tcp connections. It is the culprit of the exception. However, what causes so many CLOSE_WAIT connections, Is it Client side Hector problem? Why the other node B does not have this problem? file sockets cassandra share|improve this question edited Jan 29 '12 at 1:10 asked Jan 29 '12 at 0:48 chnet 77092446 add a comment| 1 Answer 1 active oldest votes up vote 5 down vote Instead of using netstat, try lsof -n | grep java. How many file descriptors are listed there (you can get a count with lsof -n | grep java | wc -l)? The datastax docs suggest you might be hitting a default file descriptor limit of 1024. You can change that via ulimit or in /etc/security/limits.conf. Datastax suggests the following changes: echo "* soft nofile 32768" | sudo tee -a /etc/security/limits.conf echo "* hard nofile 32768" | sudo tee -a /etc/security/limits.conf echo "root soft nofile 32768" | sudo tee -a /etc/security/limits.conf echo "root hard nofile 32768" | sudo tee -a /etc/security/limits.conf The debian package sets the follo