https://cassandra.apache.org: The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
  • Andres de la Peña
  • Avinash Lakshman
  • Aleksey Yeschenko
  • Aaron Morton
  • Ariel Weisberg
  • Blake Eggleston
  • Benedict Elliott Smith
  • Benjamin Lerer
  • Branimir Lambov
  • Brandon Williams
  • Carl Yeksigian
  • David Brosiusd
  • Dikang Gu
  • Eric Evans
  • Gary Dusbabek
  • Chris Goffinet
  • Alex Petrov
  • Laine Jaakko Olavi
  • T Jake Luciani
  • Jason Brown
  • Jonathan Ellis
  • Jake Farrell
  • Jeff Jirsa
  • Joel Knighton
  • Josh McKenzie
  • Johan Oskarsson
  • Jun Rao
  • Jay Zhuang
  • Sankalp Kohli
  • Marcus Eriksson
  • Michael Semb Wever
  • Mikhail Stepura
  • Michael Shuler
  • Paulo Motta
  • Prashant Malik
  • Robert Stupp
  • Peter Schuller
  • Sam Tunnicliffe
  • Sylvain Lebresne
  • Stefania Alborghetti
  • Tyler Hobbs
  • Vijay Parthasarathy
  • Pavel Yaskevich
  • Yuki Morishita
  • Nate McCall 
class org.apache.cassandra.service.StartupChecks$8 implements org.apache.cassandra.service.StartupCheck
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.cassandra.service.StartupChecks$8
  super_class: java.lang.Object
{
  private final long EXPECTED_MAX_MAP_COUNT;
    descriptor: J
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    ConstantValue: 1048575

  private final java.lang.String MAX_MAP_COUNT_PATH;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    ConstantValue: "/proc/sys/vm/max_map_count"

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.apache.cassandra.service.StartupChecks$8 this
         0: .line 270
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 272
            aload 0 /* this */
            ldc 1048575
            putfield org.apache.cassandra.service.StartupChecks$8.EXPECTED_MAX_MAP_COUNT:J
         2: .line 273
            aload 0 /* this */
            ldc "/proc/sys/vm/max_map_count"
            putfield org.apache.cassandra.service.StartupChecks$8.MAX_MAP_COUNT_PATH:Ljava/lang/String;
         3: .line 270
            return
        end local 0 // org.apache.cassandra.service.StartupChecks$8 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/apache/cassandra/service/StartupChecks$8;

  private long getMaxMapCount();
    descriptor: ()J
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=7, args_size=1
        start local 0 // org.apache.cassandra.service.StartupChecks$8 this
         0: .line 277
            ldc "/proc/sys/vm/max_map_count"
            iconst_0
            anewarray java.lang.String
            invokestatic java.nio.file.Paths.get:(Ljava/lang/String;[Ljava/lang/String;)Ljava/nio/file/Path;
            astore 1 /* path */
        start local 1 // java.nio.file.Path path
         1: .line 278
            aconst_null
            astore 2
            aconst_null
            astore 3
         2: aload 1 /* path */
            invokestatic java.nio.file.Files.newBufferedReader:(Ljava/nio/file/Path;)Ljava/io/BufferedReader;
            astore 4 /* bufferedReader */
        start local 4 // java.io.BufferedReader bufferedReader
         3: .line 280
            aload 4 /* bufferedReader */
            invokevirtual java.io.BufferedReader.readLine:()Ljava/lang/String;
            astore 5 /* data */
        start local 5 // java.lang.String data
         4: .line 281
            aload 5 /* data */
            ifnull 10
         5: .line 285
            aload 5 /* data */
            invokestatic java.lang.Long.parseLong:(Ljava/lang/String;)J
         6: .line 292
            aload 4 /* bufferedReader */
            ifnull 7
            aload 4 /* bufferedReader */
            invokevirtual java.io.BufferedReader.close:()V
         7: .line 285
      StackMap locals: org.apache.cassandra.service.StartupChecks$8 java.nio.file.Path java.lang.Throwable java.lang.Throwable java.io.BufferedReader java.lang.String
      StackMap stack: long
            lreturn
         8: .line 287
      StackMap locals:
      StackMap stack: java.lang.NumberFormatException
            astore 6 /* e */
        start local 6 // java.lang.NumberFormatException e
         9: .line 289
            getstatic org.apache.cassandra.service.StartupChecks.logger:Lorg/slf4j/Logger;
            ldc "Unable to parse {}."
            aload 1 /* path */
            aload 6 /* e */
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
        end local 6 // java.lang.NumberFormatException e
        end local 5 // java.lang.String data
        10: .line 292
      StackMap locals:
      StackMap stack:
            aload 4 /* bufferedReader */
            ifnull 18
            aload 4 /* bufferedReader */
            invokevirtual java.io.BufferedReader.close:()V
            goto 18
      StackMap locals:
      StackMap stack: java.lang.Throwable
        11: astore 2
            aload 4 /* bufferedReader */
            ifnull 12
            aload 4 /* bufferedReader */
            invokevirtual java.io.BufferedReader.close:()V
        end local 4 // java.io.BufferedReader bufferedReader
      StackMap locals:
      StackMap stack:
        12: aload 2
            athrow
      StackMap locals:
      StackMap stack: java.lang.Throwable
        13: astore 3
            aload 2
            ifnonnull 14
            aload 3
            astore 2
            goto 15
      StackMap locals:
      StackMap stack:
        14: aload 2
            aload 3
            if_acmpeq 15
            aload 2
            aload 3
            invokevirtual java.lang.Throwable.addSuppressed:(Ljava/lang/Throwable;)V
      StackMap locals:
      StackMap stack:
        15: aload 2
            athrow
        16: .line 293
      StackMap locals: org.apache.cassandra.service.StartupChecks$8 java.nio.file.Path
      StackMap stack: java.io.IOException
            astore 2 /* e */
        start local 2 // java.io.IOException e
        17: .line 295
            getstatic org.apache.cassandra.service.StartupChecks.logger:Lorg/slf4j/Logger;
            ldc "IO exception while reading file {}."
            aload 1 /* path */
            aload 2 /* e */
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
        end local 2 // java.io.IOException e
        18: .line 297
      StackMap locals:
      StackMap stack:
            ldc -1
            lreturn
        end local 1 // java.nio.file.Path path
        end local 0 // org.apache.cassandra.service.StartupChecks$8 this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0   19     0            this  Lorg/apache/cassandra/service/StartupChecks$8;
            1   19     1            path  Ljava/nio/file/Path;
            3   12     4  bufferedReader  Ljava/io/BufferedReader;
            4   10     5            data  Ljava/lang/String;
            9   10     6               e  Ljava/lang/NumberFormatException;
           17   18     2               e  Ljava/io/IOException;
      Exception table:
        from    to  target  type
           5     6       8  Class java.lang.NumberFormatException
           3     6      11  any
           8    10      11  any
           2     7      13  any
           8    13      13  any
           1     7      16  Class java.io.IOException
           8    16      16  Class java.io.IOException

  public void execute();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=1
        start local 0 // org.apache.cassandra.service.StartupChecks$8 this
         0: .line 302
            getstatic org.apache.cassandra.utils.FBUtilities.isLinux:Z
            ifne 2
         1: .line 303
            return
         2: .line 305
      StackMap locals:
      StackMap stack:
            invokestatic org.apache.cassandra.config.DatabaseDescriptor.getDiskAccessMode:()Lorg/apache/cassandra/config/Config$DiskAccessMode;
            getstatic org.apache.cassandra.config.Config$DiskAccessMode.standard:Lorg/apache/cassandra/config/Config$DiskAccessMode;
            if_acmpne 5
         3: .line 306
            invokestatic org.apache.cassandra.config.DatabaseDescriptor.getIndexAccessMode:()Lorg/apache/cassandra/config/Config$DiskAccessMode;
            getstatic org.apache.cassandra.config.Config$DiskAccessMode.standard:Lorg/apache/cassandra/config/Config$DiskAccessMode;
            if_acmpne 5
         4: .line 307
            return
         5: .line 309
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.apache.cassandra.service.StartupChecks$8.getMaxMapCount:()J
            lstore 1 /* maxMapCount */
        start local 1 // long maxMapCount
         6: .line 310
            lload 1 /* maxMapCount */
            ldc 1048575
            lcmp
            ifge 10
         7: .line 311
            getstatic org.apache.cassandra.service.StartupChecks.logger:Lorg/slf4j/Logger;
            ldc "Maximum number of memory map areas per process (vm.max_map_count) {} is too low, recommended value: {}, you can change it with sysctl."
         8: .line 313
            lload 1 /* maxMapCount */
            invokestatic java.lang.Long.valueOf:(J)Ljava/lang/Long;
            ldc 1048575
            invokestatic java.lang.Long.valueOf:(J)Ljava/lang/Long;
         9: .line 311
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
        10: .line 314
      StackMap locals: long
      StackMap stack:
            return
        end local 1 // long maxMapCount
        end local 0 // org.apache.cassandra.service.StartupChecks$8 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0   11     0         this  Lorg/apache/cassandra/service/StartupChecks$8;
            6   11     1  maxMapCount  J
}
SourceFile: "StartupChecks.java"
EnclosingMethod: org.apache.cassandra.service.StartupChecks
NestHost: org.apache.cassandra.service.StartupChecks
InnerClasses:
  public final DiskAccessMode = org.apache.cassandra.config.Config$DiskAccessMode of org.apache.cassandra.config.Config
  org.apache.cassandra.service.StartupChecks$8