Java Troubleshooting Guide for HP-UX Systems

ManualsBrandsHP ManualsSoftwareHP-UX Java Software

Table of Contents

About This Guide...............................................................................................................9

Intended Audience.................................................................................................................................9

Publishing History..................................................................................................................................9

Locating This Guide................................................................................................................................9

Guide Organization................................................................................................................................9

Typographic Conventions.....................................................................................................................10

Related Information..............................................................................................................................11

HP Encourages Your Comments..........................................................................................................11

1 Diagnostic and Monitoring Tools and Options........................................................13

1.1 HP-UX Java Tools and Options Tables............................................................................................13

1.1.1 Crash Analysis Tools...............................................................................................................13

1.1.2 Hung or Deadlocked Processes...............................................................................................13

1.1.3 Fatal Error Handling...............................................................................................................14

1.1.4 Memory Usage Monitoring Tools...........................................................................................14

1.1.5 Performance Tools...................................................................................................................15

1.1.6 Miscellaneous Tools and Options...........................................................................................16

1.1.7 JDK Tools Not Available on HP-UX........................................................................................16

1.2 Ctrl-Break Handler..........................................................................................................................17

1.3 Fatal Error Log (hs_err_pid<pid>.log)...................................................................................18

1.4 gcore..............................................................................................................................................18

1.5 gdb...................................................................................................................................................19

1.5.1 Java Stack Unwind Features....................................................................................................20

1.5.2 gdb Subcommands for Java VM Debugging..........................................................................20

1.6 HPjconfig.....................................................................................................................................22

1.7 HPjmeter........................................................................................................................................25

1.7.1 Static Data Analysis.................................................................................................................27

1.7.1.1 Using HPjmeter to Analyze Profiling Data...................................................................27

1.7.1.2 Using HPjmeter to Analyze Garbage Collection Data..................................................29

1.7.2 Dynamic Data Analysis...........................................................................................................29

1.7.2.1 Using HPjmeter to Monitor Applications.....................................................................29

1.7.2.2 Connecting to the Node Agent From the HPjmeter Console.......................................31

1.7.2.3 Setting Session Preferences.............................................................................................31

1.7.2.4 Viewing Monitoring Metrics During Your Open Session...............................................33

1.7.2.5 Running the HPjmeter Sample Programs.....................................................................33

1.7.2.5.1 Sample Memory Leak Application.........................................................................34

1.7.2.5.2 Sample Thread Deadlock Application....................................................................35

1.8 HPjtune..........................................................................................................................................36

1.9 hat...................................................................................................................................................36

1.10 hprof............................................................................................................................................37

1.11 java.security.debug System Property..................................................................................37

1.12 JAVA_TOOL_OPTIONS Environment Variable.............................................................................38

1.13 jconsole (1.5+ only)....................................................................................................................38

1.14 jdb.................................................................................................................................................39

1.15 jhat...............................................................................................................................................39

1.16 jps (1.5+ only)...............................................................................................................................40

1.17 jstat (1.5+ only)..........................................................................................................................40

1.18 jstatd (1.5+ only)........................................................................................................................42

1.19 jvmstat Tools..................................................................................................................................42

1.20 -verbose:class.........................................................................................................................42

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