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DistributedTeam / Cassandra

Report for Cassandra implementation of the project
Apache License 2.0
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Problem Encountered in XCND10-14 #52

Closed xpdavid closed 6 years ago

xpdavid commented 6 years ago

WARN [main] 2017-10-03 14:41:26,437 StartupChecks.java:265 - Maximum number of memory map areas per process (vm.max_map_count) 65530 is too low, recommended value: 1048575, you can change it with sysctl.

[Need ROOT Permision]

xpdavid commented 6 years ago

WARN [main] 2017-10-03 14:41:26,436 SigarLibrary.java:174 - Cassandra server running in degraded mode. Is swap disabled? : false, Address space adequate? : true, nofile limit adequate? : false, nproc limit adequate? : true

[Need Root permission]

xpdavid commented 6 years ago

WARN [main] 2017-10-03 14:41:26,420 StartupChecks.java:160 - JMX is not enabled to receive remote connections. Please see cassandra-env.sh for more info.

xpdavid commented 6 years ago

WARN [main] 2017-10-03 14:41:26,419 StartupChecks.java:127 - jemalloc shared library could not be preloaded to speed up memory allocations

[You have to install the jemalloc package which under ubuntu is named libjemalloc1.]

xpdavid commented 6 years ago

WARN [main] 2017-10-03 14:41:26,419 NativeLibrary.java:187 - Unable to lock JVM memory (ENOMEM). This can result in part of the JVM being swapped out, especially with mmapped I/O enabled. Increase RLIMIT_MEMLOCK or run Cassandra as root.

xpdavid commented 6 years ago

[SOLVED] OpenJDK 64-Bit Server VM warning: Cannot open file /var/log/cassandra/gc.log due to No such file or directory

GC log is enabled to identify potential GC issue