1 '\" t 2 .\" Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved. 3 .\" DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 .\" 5 .\" This code is free software; you can redistribute it and/or modify it 6 .\" under the terms of the GNU General Public License version 2 only, as 7 .\" published by the Free Software Foundation. 8 .\" 9 .\" This code is distributed in the hope that it will be useful, but WITHOUT 10 .\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 .\" FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 .\" version 2 for more details (a copy is included in the LICENSE file that 13 .\" accompanied this code). 14 .\" 15 .\" You should have received a copy of the GNU General Public License version 16 .\" 2 along with this work; if not, write to the Free Software Foundation, 17 .\" Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 .\" 19 .\" Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 .\" or visit www.oracle.com if you need additional information or have any 21 .\" questions. 22 .\" 23 .\" Arch: generic 24 .\" Software: JDK 8 25 .\" Date: 21 November 2013 26 .\" SectDesc: Monitoring Tools 27 .\" Title: jps.1 28 .\" 29 .if n .pl 99999 30 .TH jps 1 "21 November 2013" "JDK 8" "Monitoring Tools" 31 .\" ----------------------------------------------------------------- 32 .\" * Define some portability stuff 33 .\" ----------------------------------------------------------------- 34 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 35 .\" http://bugs.debian.org/507673 36 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html 37 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 38 .ie \n(.g .ds Aq \(aq 39 .el .ds Aq ' 40 .\" ----------------------------------------------------------------- 41 .\" * set default formatting 42 .\" ----------------------------------------------------------------- 43 .\" disable hyphenation 44 .nh 45 .\" disable justification (adjust text to left margin only) 46 .ad l 47 .\" ----------------------------------------------------------------- 48 .\" * MAIN CONTENT STARTS HERE * 49 .\" ----------------------------------------------------------------- 50 51 .SH NAME 52 jps \- Lists the instrumented Java Virtual Machines (JVMs) on the target system\&. This command is experimental and unsupported\&. 53 .SH SYNOPSIS 54 .sp 55 .nf 56 57 \fBjps\fR [ \fIoptions\fR ] [ \fIhostid\fR ] 58 .fi 59 .sp 60 .TP 61 \fIoptions\fR 62 Command-line options\&. See Options\&. 63 .TP 64 \fIhostid\fR 65 The identifier of the host for which the process report should be generated\&. The \f3hostid\fR can include optional components that indicate the communications protocol, port number, and other implementation specific data\&. See Host Identifier\&. 66 .SH DESCRIPTION 67 The \f3jps\fR command lists the instrumented Java HotSpot VMs on the target system\&. The command is limited to reporting information on JVMs for which it has the access permissions\&. 68 .PP 69 If the \f3jps\fR command is run without specifying a \f3hostid\fR, then it searches for instrumented JVMs on the local host\&. If started with a \f3hostid\fR, then it searches for JVMs on the indicated host, using the specified protocol and port\&. A \f3jstatd\fR process is assumed to be running on the target host\&. 70 .PP 71 The \f3jps\fR command reports the local JVM identifier, or \f3lvmid\fR, for each instrumented JVM found on the target system\&. The \f3lvmid\fR is typically, but not necessarily, the operating system\&'s process identifier for the JVM process\&. With no options, \f3jps\fR lists each Java application\&'s \f3lvmid\fR followed by the short form of the application\&'s class name or jar file name\&. The short form of the class name or JAR file name omits the class\&'s package information or the JAR files path information\&. 72 .PP 73 The \f3jps\fR command uses the Java launcher to find the class name and arguments passed to the main method\&. If the target JVM is started with a custom launcher, then the class or JAR file name and the arguments to the \f3main\fR method are not available\&. In this case, the \f3jps\fR command outputs the string \f3Unknown\fR for the class name or JAR file name and for the arguments to the \f3main\fR method\&. 74 .PP 75 The list of JVMs produced by the \f3jps\fR command can be limited by the permissions granted to the principal running the command\&. The command only lists the JVMs for which the principle has access rights as determined by operating system-specific access control mechanisms\&. 76 .SH OPTIONS 77 The \f3jps\fR command supports a number of options that modify the output of the command\&. These options are subject to change or removal in the future\&. 78 .TP 79 -q 80 .br 81 Suppresses the output of the class name, JAR file name, and arguments passed to the \f3main\fR method, producing only a list of local JVM identifiers\&. 82 .TP 83 -m 84 .br 85 Displays the arguments passed to the \f3main\fR method\&. The output may be \f3null\fR for embedded JVMs\&. 86 .TP 87 -l 88 .br 89 Displays the full package name for the application\&'s \f3main\fR class or the full path name to the application\&'s JAR file\&. 90 .TP 91 -v 92 .br 93 Displays the arguments passed to the JVM\&. 94 .TP 95 -V 96 .br 97 Suppresses the output of the class name, JAR file name, and arguments passed to the main method, producing only a list of local JVM identifiers\&. 98 .TP 99 -J\f3option\fR 100 .br 101 Passes \f3option\fR to the JVM, where option is one of the \f3options\fR described on the reference page for the Java application launcher\&. For example, \f3-J-Xms48m\fR sets the startup memory to 48 MB\&. See java(1)\&. 102 .SH HOST\ IDENTIFIER 103 The host identifier, or \f3hostid\fR is a string that indicates the target system\&. The syntax of the \f3hostid\fR string corresponds to the syntax of a URI: 104 .sp 105 .nf 106 \f3[protocol:][[//]hostname][:port][/servername]\fP 107 .fi 108 .nf 109 \f3\fP 110 .fi 111 .sp 112 .TP 113 \fIprotocol\fR 114 The communications protocol\&. If the \f3protocol\fR is omitted and a \f3hostname\fR is not specified, then the default protocol is a platform-specific, optimized, local protocol\&. If the protocol is omitted and a host name is specified, then the default protocol is \f3rmi\fR\&. 115 .TP 116 hostname 117 A hostname or IP address that indicates the target host\&. If you omit the \f3hostname\fR parameter, then the target host is the local host\&. 118 .TP 119 port 120 The default port for communicating with the remote server\&. If the \f3hostname\fR parameter is omitted or the \f3protocol\fR parameter specifies an optimized, local protocol, then the \f3port\fR parameter is ignored\&. Otherwise, treatment of the \f3port\fR parameter is implementation specific\&. For the default \f3rmi\fR protocol, the \f3port\fR parameter indicates the port number for the rmiregistry on the remote host\&. If the \f3port\fR parameter is omitted, and the \f3protocol\fR parameter indicates \f3rmi\fR, then the default rmiregistry port (1099) is used\&. 121 .TP 122 servername 123 The treatment of this parameter depends on the implementation\&. For the optimized, local protocol, this field is ignored\&. For the \f3rmi\fR protocol, this parameter is a string that represents the name of the RMI remote object on the remote host\&. See the \f3jstatd\fR command \f3-n\fRoption for more information\&. 124 .SH OUTPUT\ FORMAT 125 The output of the \f3jps\fR command follows the following pattern: 126 .sp 127 .nf 128 \f3lvmid [ [ classname | JARfilename | "Unknown"] [ arg* ] [ jvmarg* ] ]\fP 129 .fi 130 .nf 131 \f3\fP 132 .fi 133 .sp 134 All output tokens are separated by white space\&. An \f3arg\fR value that includes embedded white space introduces ambiguity when attempting to map arguments to their actual positional parameters\&. 135 .PP 136 \fINote:\fR It is recommended that you do not write scripts to parse \f3jps\fR output because the format might change in future releases\&. If you write scripts that parse \f3jps\fR output, then expect to modify them for future releases of this tool\&. 137 .SH EXAMPLES 138 This section provides examples of the \f3jps\fR command\&. 139 .PP 140 List the instrumented JVMs on the local host: 141 .sp 142 .nf 143 \f3jps\fP 144 .fi 145 .nf 146 \f318027 Java2Demo\&.JAR\fP 147 .fi 148 .nf 149 \f318032 jps\fP 150 .fi 151 .nf 152 \f318005 jstat\fP 153 .fi 154 .nf 155 \f3\fP 156 .fi 157 .sp 158 The following example lists the instrumented JVMs on a remote host\&. This example assumes that the \f3jstat\fR server and either the its internal RMI registry or a separate external rmiregistry process are running on the remote host on the default port (port 1099)\&. It also assumes that the local host has appropriate permissions to access the remote host\&. This example also includes the \f3-l\fR option to output the long form of the class names or JAR file names\&. 159 .sp 160 .nf 161 \f3jps \-l remote\&.domain\fP 162 .fi 163 .nf 164 \f33002 /opt/jdk1\&.7\&.0/demo/jfc/Java2D/Java2Demo\&.JAR\fP 165 .fi 166 .nf 167 \f32857 sun\&.tools\&.jstatd\&.jstatd\fP 168 .fi 169 .nf 170 \f3\fP 171 .fi 172 .sp 173 The following example lists the instrumented JVMs on a remote host with a non-default port for the RMI registry\&. This example assumes that the \f3jstatd\fR server, with an internal RMI registry bound to port 2002, is running on the remote host\&. This example also uses the \f3-m\fR option to include the arguments passed to the \f3main\fR method of each of the listed Java applications\&. 174 .sp 175 .nf 176 \f3jps \-m remote\&.domain:2002\fP 177 .fi 178 .nf 179 \f33002 /opt/jdk1\&.7\&.0/demo/jfc/Java2D/Java2Demo\&.JAR\fP 180 .fi 181 .nf 182 \f33102 sun\&.tools\&.jstatd\&.jstatd \-p 2002\fP 183 .fi 184 .nf 185 \f3\fP 186 .fi 187 .sp 188 .SH SEE\ ALSO 189 .TP 0.2i 190 \(bu 191 java(1) 192 .TP 0.2i 193 \(bu 194 jstat(1) 195 .TP 0.2i 196 \(bu 197 jstatd(1) 198 .TP 0.2i 199 \(bu 200 rmiregistry(1) 201 .RE 202 .br 203 'pl 8.5i 204 'bp