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 
public class org.apache.cassandra.utils.SigarLibrary
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.cassandra.utils.SigarLibrary
  super_class: java.lang.Object
{
  private org.slf4j.Logger logger;
    descriptor: Lorg/slf4j/Logger;
    flags: (0x0002) ACC_PRIVATE

  public static final org.apache.cassandra.utils.SigarLibrary instance;
    descriptor: Lorg/apache/cassandra/utils/SigarLibrary;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  private org.hyperic.sigar.Sigar sigar;
    descriptor: Lorg/hyperic/sigar/Sigar;
    flags: (0x0002) ACC_PRIVATE

  private org.hyperic.sigar.FileSystemMap mounts;
    descriptor: Lorg/hyperic/sigar/FileSystemMap;
    flags: (0x0002) ACC_PRIVATE

  private boolean initialized;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  private long INFINITY;
    descriptor: J
    flags: (0x0002) ACC_PRIVATE

  private long EXPECTED_MIN_NOFILE;
    descriptor: J
    flags: (0x0002) ACC_PRIVATE

  private long EXPECTED_NPROC;
    descriptor: J
    flags: (0x0002) ACC_PRIVATE

  private long EXPECTED_AS;
    descriptor: J
    flags: (0x0002) ACC_PRIVATE

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 28
            new org.apache.cassandra.utils.SigarLibrary
            dup
            invokespecial org.apache.cassandra.utils.SigarLibrary.<init>:()V
            putstatic org.apache.cassandra.utils.SigarLibrary.instance:Lorg/apache/cassandra/utils/SigarLibrary;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=2, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 42
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 26
            aload 0 /* this */
            ldc Lorg/apache/cassandra/utils/SigarLibrary;
            invokestatic org.slf4j.LoggerFactory.getLogger:(Ljava/lang/Class;)Lorg/slf4j/Logger;
            putfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
         2: .line 31
            aload 0 /* this */
            aconst_null
            putfield org.apache.cassandra.utils.SigarLibrary.mounts:Lorg/hyperic/sigar/FileSystemMap;
         3: .line 32
            aload 0 /* this */
            iconst_0
            putfield org.apache.cassandra.utils.SigarLibrary.initialized:Z
         4: .line 33
            aload 0 /* this */
            ldc -1
            putfield org.apache.cassandra.utils.SigarLibrary.INFINITY:J
         5: .line 34
            aload 0 /* this */
            ldc 10000
            putfield org.apache.cassandra.utils.SigarLibrary.EXPECTED_MIN_NOFILE:J
         6: .line 35
            aload 0 /* this */
            ldc 32768
            putfield org.apache.cassandra.utils.SigarLibrary.EXPECTED_NPROC:J
         7: .line 36
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.INFINITY:J
            putfield org.apache.cassandra.utils.SigarLibrary.EXPECTED_AS:J
         8: .line 44
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Initializing SIGAR library"
            invokeinterface org.slf4j.Logger.info:(Ljava/lang/String;)V
         9: .line 47
            aload 0 /* this */
            new org.hyperic.sigar.Sigar
            dup
            invokespecial org.hyperic.sigar.Sigar.<init>:()V
            putfield org.apache.cassandra.utils.SigarLibrary.sigar:Lorg/hyperic/sigar/Sigar;
        10: .line 48
            aload 0 /* this */
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.sigar:Lorg/hyperic/sigar/Sigar;
            invokevirtual org.hyperic.sigar.Sigar.getFileSystemMap:()Lorg/hyperic/sigar/FileSystemMap;
            putfield org.apache.cassandra.utils.SigarLibrary.mounts:Lorg/hyperic/sigar/FileSystemMap;
        11: .line 49
            aload 0 /* this */
            iconst_1
            putfield org.apache.cassandra.utils.SigarLibrary.initialized:Z
        12: .line 50
            goto 18
        13: .line 51
      StackMap locals: org.apache.cassandra.utils.SigarLibrary
      StackMap stack: org.hyperic.sigar.SigarException
            astore 1 /* e */
        start local 1 // org.hyperic.sigar.SigarException e
        14: .line 53
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Could not initialize SIGAR library {} "
            aload 1 /* e */
            invokevirtual org.hyperic.sigar.SigarException.getMessage:()Ljava/lang/String;
            invokeinterface org.slf4j.Logger.info:(Ljava/lang/String;Ljava/lang/Object;)V
        end local 1 // org.hyperic.sigar.SigarException e
        15: goto 18
        16: .line 55
      StackMap locals:
      StackMap stack: java.lang.UnsatisfiedLinkError
            astore 1 /* linkError */
        start local 1 // java.lang.UnsatisfiedLinkError linkError
        17: .line 57
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Could not initialize SIGAR library {} "
            aload 1 /* linkError */
            invokevirtual java.lang.UnsatisfiedLinkError.getMessage:()Ljava/lang/String;
            invokeinterface org.slf4j.Logger.info:(Ljava/lang/String;Ljava/lang/Object;)V
        end local 1 // java.lang.UnsatisfiedLinkError linkError
        18: .line 59
      StackMap locals:
      StackMap stack:
            return
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   19     0       this  Lorg/apache/cassandra/utils/SigarLibrary;
           14   15     1          e  Lorg/hyperic/sigar/SigarException;
           17   18     1  linkError  Ljava/lang/UnsatisfiedLinkError;
      Exception table:
        from    to  target  type
           9    12      13  Class org.hyperic.sigar.SigarException
           9    12      16  Class java.lang.UnsatisfiedLinkError

  public boolean initialized();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 67
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.initialized:Z
            ireturn
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/cassandra/utils/SigarLibrary;

  private boolean hasAcceptableProcNumber();
    descriptor: ()Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=3, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 74
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.sigar:Lorg/hyperic/sigar/Sigar;
            invokevirtual org.hyperic.sigar.Sigar.getResourceLimit:()Lorg/hyperic/sigar/ResourceLimit;
            invokevirtual org.hyperic.sigar.ResourceLimit.getProcessesMax:()J
            lstore 1 /* fileMax */
        start local 1 // long fileMax
         1: .line 75
            lload 1 /* fileMax */
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.EXPECTED_NPROC:J
            lcmp
            ifge 2
            lload 1 /* fileMax */
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.INFINITY:J
            lcmp
            ifne 3
         2: .line 77
      StackMap locals: long
      StackMap stack:
            iconst_1
            ireturn
         3: .line 81
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // long fileMax
         4: .line 84
      StackMap locals: org.apache.cassandra.utils.SigarLibrary
      StackMap stack: org.hyperic.sigar.SigarException
            astore 1 /* sigarException */
        start local 1 // org.hyperic.sigar.SigarException sigarException
         5: .line 86
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Could not determine if max processes was acceptable. Error message: {}"
            aload 1 /* sigarException */
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;Ljava/lang/Throwable;)V
         6: .line 87
            iconst_0
            ireturn
        end local 1 // org.hyperic.sigar.SigarException sigarException
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    7     0            this  Lorg/apache/cassandra/utils/SigarLibrary;
            1    4     1         fileMax  J
            5    7     1  sigarException  Lorg/hyperic/sigar/SigarException;
      Exception table:
        from    to  target  type
           0     2       4  Class org.hyperic.sigar.SigarException

  private boolean hasAcceptableFileLimits();
    descriptor: ()Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=3, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 95
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.sigar:Lorg/hyperic/sigar/Sigar;
            invokevirtual org.hyperic.sigar.Sigar.getResourceLimit:()Lorg/hyperic/sigar/ResourceLimit;
            invokevirtual org.hyperic.sigar.ResourceLimit.getOpenFilesMax:()J
            lstore 1 /* fileMax */
        start local 1 // long fileMax
         1: .line 96
            lload 1 /* fileMax */
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.EXPECTED_MIN_NOFILE:J
            lcmp
            ifge 2
            lload 1 /* fileMax */
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.INFINITY:J
            lcmp
            ifne 3
         2: .line 98
      StackMap locals: long
      StackMap stack:
            iconst_1
            ireturn
         3: .line 102
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // long fileMax
         4: .line 105
      StackMap locals: org.apache.cassandra.utils.SigarLibrary
      StackMap stack: org.hyperic.sigar.SigarException
            astore 1 /* sigarException */
        start local 1 // org.hyperic.sigar.SigarException sigarException
         5: .line 107
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Could not determine if max open file handle limit is correctly configured. Error message: {}"
            aload 1 /* sigarException */
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;Ljava/lang/Throwable;)V
         6: .line 108
            iconst_0
            ireturn
        end local 1 // org.hyperic.sigar.SigarException sigarException
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    7     0            this  Lorg/apache/cassandra/utils/SigarLibrary;
            1    4     1         fileMax  J
            5    7     1  sigarException  Lorg/hyperic/sigar/SigarException;
      Exception table:
        from    to  target  type
           0     2       4  Class org.hyperic.sigar.SigarException

  private boolean hasAcceptableAddressSpace();
    descriptor: ()Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=3, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 115
            getstatic org.apache.cassandra.utils.FBUtilities.isWindows:Z
            ifeq 2
         1: .line 116
            iconst_1
            ireturn
         2: .line 120
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.sigar:Lorg/hyperic/sigar/Sigar;
            invokevirtual org.hyperic.sigar.Sigar.getResourceLimit:()Lorg/hyperic/sigar/ResourceLimit;
            invokevirtual org.hyperic.sigar.ResourceLimit.getVirtualMemoryMax:()J
            lstore 1 /* fileMax */
        start local 1 // long fileMax
         3: .line 121
            lload 1 /* fileMax */
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.EXPECTED_AS:J
            lcmp
            ifne 5
         4: .line 123
            iconst_1
            ireturn
         5: .line 127
      StackMap locals: long
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // long fileMax
         6: .line 130
      StackMap locals: org.apache.cassandra.utils.SigarLibrary
      StackMap stack: org.hyperic.sigar.SigarException
            astore 1 /* sigarException */
        start local 1 // org.hyperic.sigar.SigarException sigarException
         7: .line 132
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Could not determine if VirtualMemoryMax was acceptable. Error message: {}"
            aload 1 /* sigarException */
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;Ljava/lang/Throwable;)V
         8: .line 133
            iconst_0
            ireturn
        end local 1 // org.hyperic.sigar.SigarException sigarException
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    9     0            this  Lorg/apache/cassandra/utils/SigarLibrary;
            3    6     1         fileMax  J
            7    9     1  sigarException  Lorg/hyperic/sigar/SigarException;
      Exception table:
        from    to  target  type
           2     4       6  Class org.hyperic.sigar.SigarException

  private boolean isSwapEnabled();
    descriptor: ()Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 141
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.sigar:Lorg/hyperic/sigar/Sigar;
            invokevirtual org.hyperic.sigar.Sigar.getSwap:()Lorg/hyperic/sigar/Swap;
            astore 1 /* swap */
        start local 1 // org.hyperic.sigar.Swap swap
         1: .line 142
            aload 1 /* swap */
            invokevirtual org.hyperic.sigar.Swap.getTotal:()J
            lstore 2 /* swapSize */
        start local 2 // long swapSize
         2: .line 143
            lload 2 /* swapSize */
            lconst_0
            lcmp
            ifle 4
         3: .line 145
            iconst_1
            ireturn
         4: .line 149
      StackMap locals: org.hyperic.sigar.Swap long
      StackMap stack:
            iconst_0
            ireturn
        end local 2 // long swapSize
        end local 1 // org.hyperic.sigar.Swap swap
         5: .line 152
      StackMap locals: org.apache.cassandra.utils.SigarLibrary
      StackMap stack: org.hyperic.sigar.SigarException
            astore 1 /* sigarException */
        start local 1 // org.hyperic.sigar.SigarException sigarException
         6: .line 154
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Could not determine if swap configuration is acceptable. Error message: {}"
            aload 1 /* sigarException */
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;Ljava/lang/Throwable;)V
         7: .line 155
            iconst_0
            ireturn
        end local 1 // org.hyperic.sigar.SigarException sigarException
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    8     0            this  Lorg/apache/cassandra/utils/SigarLibrary;
            1    5     1            swap  Lorg/hyperic/sigar/Swap;
            2    5     2        swapSize  J
            6    8     1  sigarException  Lorg/hyperic/sigar/SigarException;
      Exception table:
        from    to  target  type
           0     3       5  Class org.hyperic.sigar.SigarException

  public long getPid();
    descriptor: ()J
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 161
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.initialized:Z
            ifeq 1
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.sigar:Lorg/hyperic/sigar/Sigar;
            invokevirtual org.hyperic.sigar.Sigar.getPid:()J
            goto 2
      StackMap locals:
      StackMap stack:
         1: ldc -1
      StackMap locals:
      StackMap stack: long
         2: lreturn
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/cassandra/utils/SigarLibrary;

  public void warnIfRunningInDegradedMode();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=5, args_size=1
        start local 0 // org.apache.cassandra.utils.SigarLibrary this
         0: .line 166
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.initialized:Z
            ifeq 15
         1: .line 168
            aload 0 /* this */
            invokevirtual org.apache.cassandra.utils.SigarLibrary.isSwapEnabled:()Z
            istore 1 /* swapEnabled */
        start local 1 // boolean swapEnabled
         2: .line 169
            aload 0 /* this */
            invokevirtual org.apache.cassandra.utils.SigarLibrary.hasAcceptableAddressSpace:()Z
            istore 2 /* goodAddressSpace */
        start local 2 // boolean goodAddressSpace
         3: .line 170
            aload 0 /* this */
            invokevirtual org.apache.cassandra.utils.SigarLibrary.hasAcceptableFileLimits:()Z
            istore 3 /* goodFileLimits */
        start local 3 // boolean goodFileLimits
         4: .line 171
            aload 0 /* this */
            invokevirtual org.apache.cassandra.utils.SigarLibrary.hasAcceptableProcNumber:()Z
            istore 4 /* goodProcNumber */
        start local 4 // boolean goodProcNumber
         5: .line 172
            iload 1 /* swapEnabled */
            ifne 6
            iload 2 /* goodAddressSpace */
            ifeq 6
            iload 3 /* goodFileLimits */
            ifeq 6
            iload 4 /* goodProcNumber */
            ifne 13
         6: .line 174
      StackMap locals: org.apache.cassandra.utils.SigarLibrary int int int int
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Cassandra server running in degraded mode. Is swap disabled? : {},  Address space adequate? : {},  nofile limit adequate? : {}, nproc limit adequate? : {} "
            iconst_4
            anewarray java.lang.Object
            dup
            iconst_0
         7: .line 175
            iload 1 /* swapEnabled */
            ifeq 8
            iconst_0
            goto 9
      StackMap locals: org.apache.cassandra.utils.SigarLibrary int int int int
      StackMap stack: org.slf4j.Logger java.lang.String java.lang.Object[] java.lang.Object[] int
         8: iconst_1
      StackMap locals: org.apache.cassandra.utils.SigarLibrary int int int int
      StackMap stack: org.slf4j.Logger java.lang.String java.lang.Object[] java.lang.Object[] int int
         9: invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            aastore
            dup
            iconst_1
            iload 2 /* goodAddressSpace */
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            aastore
            dup
            iconst_2
        10: .line 176
            iload 3 /* goodFileLimits */
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            aastore
            dup
            iconst_3
            iload 4 /* goodProcNumber */
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            aastore
        11: .line 174
            invokeinterface org.slf4j.Logger.warn:(Ljava/lang/String;[Ljava/lang/Object;)V
        12: .line 177
            goto 16
        13: .line 180
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Checked OS settings and found them configured for optimal performance."
            invokeinterface org.slf4j.Logger.info:(Ljava/lang/String;)V
        end local 4 // boolean goodProcNumber
        end local 3 // boolean goodFileLimits
        end local 2 // boolean goodAddressSpace
        end local 1 // boolean swapEnabled
        14: .line 182
            goto 16
        15: .line 185
      StackMap locals: org.apache.cassandra.utils.SigarLibrary
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.cassandra.utils.SigarLibrary.logger:Lorg/slf4j/Logger;
            ldc "Sigar could not be initialized, test for checking degraded mode omitted."
            invokeinterface org.slf4j.Logger.info:(Ljava/lang/String;)V
        16: .line 187
      StackMap locals:
      StackMap stack:
            return
        end local 0 // org.apache.cassandra.utils.SigarLibrary this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0   17     0              this  Lorg/apache/cassandra/utils/SigarLibrary;
            2   14     1       swapEnabled  Z
            3   14     2  goodAddressSpace  Z
            4   14     3    goodFileLimits  Z
            5   14     4    goodProcNumber  Z
}
SourceFile: "SigarLibrary.java"