DISPLAY CONN
Use the MQSC command DISPLAY CONN to display connection information about the applications connected to the queue manager. This is a useful command because it enables you to identify applications with long-running units of work.
UNIX and Linux® | Windows |
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Usage notes for DISPLAY CONN
- This command is issued internally by WebSphere® MQ on z/OS when taking a checkpoint, and when the queue manager is starting and stopping, so that a list of units of work that are in doubt at the time is written to the z/OS console log.
- The TOPICSTR parameter might contain characters that cannot be translated into printable characters when the command output is displayed. On z/OS, these non-printable characters will be displayed as blanks. On distributed platforms using runmqsc, these non-printable characters will be displayed as dots.
- The state of asynchronous consumers, ASTATE, reflects that of the server-connection proxy on behalf of the client application; it does not reflect the client application state.
Parameter descriptions for DISPLAY CONN
You must specify a connection for which you want to display information. This can be a specific connection identifier or a generic connection identifier. A single asterisk (*) can be used as a generic connection identifier to display information for all connections.
- (generic-connid)
- The identifier of the connection definition for which information
is to be displayed. A single asterisk (*) specifies that information
for all connection identifiers is to be displayed.
When an application connects to WebSphere MQ, it is given a unique 24-byte connection identifier (ConnectionId). The value for CONN is formed by converting the last eight bytes of the ConnectionId to its 16 -character hexadecimal equivalent.
- WHERE
- Specify a filter condition to display only those connections that
satisfy the selection criterion of the filter condition. The filter
condition is in three parts: filter-keyword, operator, and filter-value:
- filter-keyword
- Almost any parameter that can be used to display attributes for this DISPLAY command. However, you cannot use the CMDSCOPE, EXTCONN, QSGDISP, TYPE, and EXTURID parameters as filter keywords.
- operator
- This is used to determine whether a connection satisfies the filter
value on the given filter keyword. The operators are:
- LT
- Less than
- GT
- Greater than
- EQ
- Equal to
- NE
- Not equal to
- LE
- Less than or equal to
- GE
- Greater than or equal to
- LK
- Matches a generic string that you provide as a filter-value
- NL
- Does not match a generic string that you provide as a filter-value
- CT
- Contains a specified item. If the filter-keyword is a list, you can use this to display objects the attributes of which contain the specified item. You cannot use the CONNOPTS value MQCNO_STANDARD_BINDING with this operator.
- EX
- Does not contain a specified item. If the filter-keyword is a list, you can use this to display objects the attributes of which do not contain the specified item. You cannot use the CONNOPTS value MQCNO_STANDARD_BINDING with this operator.
- filter-value
- The value that the attribute value must be tested against using
the operator. Depending on the filter-keyword, this can be:
- An explicit value, that is a valid value for the attribute being
tested.
You can use operators LT, GT, EQ, NE, LE or GE only. However, if the attribute value is one from a possible set of values on a parameter (for example, the value NONE on the UOWSTATE parameter), you can only use EQ or NE.
- A generic value. This is a character string (such as the character
string in the APPLTAG parameter) with an asterisk at the end, for
example ABC*. If the operator is LK, all items where the attribute
value begins with the string (ABC in the example) are listed. If the
operator is NL, all items where the attribute value does not begin
with the string are listed. Only a single trailing wildcard character
(asterisk) is permitted.
You cannot use a generic filter-value for parameters with numeric values or with one of a set of values.
- An item in a list of values. Use CT or EX as the operator. For example, if the value DEF is specified with the operator CT, all items where one of the attribute values is DEF are listed.
- An explicit value, that is a valid value for the attribute being
tested.
- ALL
- Specify this to display all the connection information of the requested type for each specified connection. This is the default if you do not specify a generic identifier, and do not request any specific parameters.
- CMDSCOPE
- This parameter applies to z/OS only and specifies how the command is executed when the queue manager
is a member of a queue-sharing group.
- ' '
- The command is executed on the queue manager on which it was entered. This is the default value.
- qmgr-name
- The command is executed on the queue manager you specify, providing
the queue manager is active within the queue-sharing group.
You can specify a queue manager name, other than the queue manager on which it was entered, only if you are using a queue-sharing group environment and if the command server is enabled.
- *
- The command is executed on the local queue manager and is also passed to every active queue manager in the queue-sharing group. The effect of this is the same as entering the command on every queue manager in the queue-sharing group.
You cannot use CMDSCOPE as a filter keyword.
- EXTCONN
- The value
for EXTCONN is based on the first sixteen bytes of the ConnectionId
converted to its 32 -character hexadecimal equivalent.
Connections are identified by a 24-byte connection identifier. The connection identifier comprises a prefix, which identifies the queue manager, and a suffix which identifies the connection to that queue manager. By default, the prefix is for the queue manager currently being administered, but you can specify a prefix explicitly by using the EXTCONN parameter. Use the CONN parameter to specify the suffix.
When connection identifiers are obtained from other sources, specify the fully qualified connection identifier (both EXTCONN and CONN) to avoid possible problems related to non-unique CONN values.
Do not specify both a generic value for CONN and a non-generic value for EXTCONN.
You cannot use EXTCONN as a filter keyword.
- TYPE
- Specifies the type of information to be displayed. Values are:
- CONN
- Connection information for the specified connection. On z/OS, this includes threads which may be logically or actually disassociated from a connection, together with those that are in-doubt and for which external intervention is needed to resolve them. These latter threads are those that DIS THREAD TYPE(INDOUBT) would show.
- HANDLE
- Information relating to any objects opened by the specified connection.
- *
- Display all available information relating to the connection.
- ALL
- Display all available information relating to the connection.
- URDISP
- Specifies the unit of recovery disposition
of connections to be displayed. Values are:
- ALL
- Display all connections. This is the default option.
- GROUP
- Display only those connections with a GROUP unit of recovery disposition.
- QMGR
- Display only those connections with a QMGR unit of recovery disposition.
Connection attributes
- Connection identifier (CONN parameter)
- Type of information returned (TYPE parameter)
- APPLDESC
- A string containing a description of the application connected to the queue manager, where it is known. If the application is not recognized by the queue manager the description returned is blank.
- APPLTAG
- A string
containing the tag of the application connected to the queue manager.
It is one of the following:
- z/OS batch job name
- TSO USERID
- CICS APPLID
- IMS region name
- Channel initiator job name
- UNIX
processNotes:
- On HP-UX if the process name exceeds 14 characters, only the first 14 characters are shown.
- On Linux and Solaris, if the process name exceeds 15 characters, only the first 15 characters are shown.
- On AIX®, if the process name exceeds 28 characters, only the first 28 characters are shown.
- Windows processNote: This consists of the full program path and executable file name. If it is more than 28 characters long, only the last 28 characters are shown.
- Internal queue manager process name
- APPLTYPE
- A string indicating the type of the application that
is connected to the queue manager. It is one of the following:
- BATCH
- Application using a batch connection
- RRSBATCH
- RRS-coordinated application using a batch connection
- CICS
- CICS transaction
- IMS
- IMS transaction
- CHINIT
- Channel initiator
- OS400
- An IBM® i application
- SYSTEM
- Queue manager
- SYSTEMEXT
- Application performing an extension of function that is provided by the queue manager
- UNIX
- A UNIX application
- USER
- A user application
- WINDOWSNT
- A Windows application
- ASID
- A 4-character
address-space identifier of the application identified by APPLTAG.
It distinguishes duplicate values of APPLTAG.
This parameter is returned only on z/OS when the APPLTYPE parameter does not have the value SYSTEM.
This parameter is valid only on z/OS.
- ASTATE
- The state of asynchronous consumption on this connection
handle.
Possible values are:
- SUSPENDED
- An MQCTL call with the Operation parameter set to MQOP_SUSPEND has been issued against the connection handle so that so that asynchronous message consumption is temporarily suspended on this connection.
- STARTED
- An MQCTL call with the Operation parameter set to MQOP_START has been issued against the connection handle so that asynchronous message consumption can proceed on this connection.
- STARTWAIT
- An MQCTL call with the Operation parameter set to MQOP_START_WAIT has been issued against the connection handle so that asynchronous message consumption can proceed on this connection.
- STOPPED
- An MQCTL call with the Operation parameter set to MQOP_STOP has been issued against the connection handle so that asynchronous message consumption cannot currently proceed on this connection.
- NONE
- No MQCTL call has been issued against the connection handle. Asynchronous message consumption cannot currently proceed on this connection.
- CHANNEL
- The name of the channel that owns the connection. If there is no channel associated with the connection, this parameter is blank.
- CONNAME
- The connection name associated with the channel that owns the connection. If there is no channel associated with the connection, this parameter is blank.
- CONNOPTS
- The connect options currently in force
for this application connection. Possible values are:
- MQCNO_ACCOUNTING_Q_DISABLED
- MQCNO_ACCOUNTING_Q_ENABLED
- MQCNO_ACCOUNTING_MQI_DISABLED
- MQCNO_ACCOUNTING_MQI_ENABLED
- MQCNO_FASTPATH_BINDING
- MQCNO_HANDLE_SHARE_BLOCK
- MQCNO_HANDLE_SHARE_NO_BLOCK
- MQCNO_HANDLE_SHARE_NONE
- MQCNO_ISOLATED_BINDING
- MQCNO_RECONNECT
- MQCNO_RECONNECT_Q_MGR
- MQCNO_RESTRICT_CONN_TAG_Q_MGR
- MQCNO_RESTRICT_CONN_TAG_QSG
- MQCNO_SERIALIZE_CONN_TAG_Q_MGR
- MQCNO_SERIALIZE_CONN_TAG_QSG
- MQCNO_SHARED_BINDING
- MQCNO_STANDARD_BINDING
The values displayed for MQCNO_RECONNECT and MQCNO_RECONNECT_Q_MGR are only displayed if the application specifies them explicitly. If the values are picked up from an mqclient.ini file setting or the CLNTCONN channel definition, then neither value is displayed.
You cannot use the value MQCNO_STANDARD_BINDING as a filter value with the CT and EX operators on the WHERE parameter.
- EXTURID
- The external
unit of recovery identifier associated with this connection. Its format
is determined by the value of URTYPE.
You cannot use EXTURID as a filter keyword.
- NID
- Origin identifier,
set only if the value of UOWSTATE is UNRESOLVED. This is a unique
token identifying the unit of work within the queue manager. It is
of the form
origin-node.origin-urid
whereorigin-node
identifies the originator of the thread, except in the case where APPLTYPE is set to RRSBATCH, when it is omitted.origin-urid
is the hexadecimal number assigned to the unit of recovery by the originating system for the specific thread to be resolved.
This parameter is valid only on z/OS.
- PID
- Number specifying
the process identifier of the application that is connected to the
queue manager.
This parameter is not valid on z/OS.
- PSBNAME
- The 8-character
name of the program specification block (PSB) associated with the
running IMS transaction. You can use the PSBNAME and
PSTID to purge the transaction using IMS commands.
It is valid on z/OS only.
This parameter is returned only when the APPLTYPE parameter has the value IMS.
- PSTID
- The 4-character IMS program specification table (PST) region identifier for
the connected IMS region. It is valid on z/OS only.
This parameter is returned only when the APPLTYPE parameter has the value IMS.
- QMURID
- The queue
manager unit of recovery identifier. On z/OS, this is a 6 -byte log RBA, displayed as 12 hexadecimal characters.
On platforms other than z/OS, this is an 8 -byte transaction
identifier, displayed as
m.n
wherem
andn
are the decimal representation of the first and last 4 bytes of the transaction identifier.You can use QMURID as a filter keyword. On z/OS, you must specify the filter value as a hexadecimal string. On platforms other than z/OS, you must specify the filter value as a pair of decimal numbers separated by a period (.). You can only use the EQ, NE, GT, LT, GE, or LE filter operators. However, on z/OS, if log shunting has taken place, as indicated by message CSQR026I, instead of the RBA you have to use the URID from the message.
- TASKNO
- A 7-digit CICS task number. This number can be used in the CICS command "CEMT SET TASK(taskno) PURGE" to end the CICS task. This parameter is valid on z/OS only.
This parameter is returned only when the APPLTYPE parameter has the value CICS.
- TID
- Number specifying
the thread identifier within the application process that has opened
the specified queue.
This parameter is not valid on z/OS.
- TRANSID
- A 4-character CICS transaction identifier. This parameter is valid on z/OS only.
This parameter is returned only when the APPLTYPE parameter has the value CICS.
- UOWLOG
- The file
name of the extent to which the transaction associated with this connection
first wrote.
This parameter is valid only on platforms other than z/OS.
- UOWLOGDA
- The date that the transaction associated with the current connection first wrote to the log.
- UOWLOGTI
- The time that the transaction associated with the current connection first wrote to the log.
- UOWSTATE
- The state of the unit of work. It is one of the following:
- NONE
- There is no unit of work.
- ACTIVE
- The unit of work is active.
- PREPARED
- The unit of work is in the process of being committed.
- UNRESOLVED
- The unit of work is in the second phase of a two-phase commit operation. WebSphere MQ holds resources on its behalf and external intervention is required to resolve it. This might be as simple as starting the recovery coordinator (such as CICS, IMS, or RRS) or it might involve a more complex operation such as using the RESOLVE INDOUBT command. The UNRESOLVED value can occur only on z/OS.
- UOWSTDA
- The date that the transaction associated with the current connection was started.
- UOWSTTI
- The time that the transaction associated with the current connection was started.
- URTYPE
- The type of unit of recovery as seen by the queue manager.
It is one of the following:
- CICS (valid only on z/OS)
- XA
- RRS (valid only on z/OS)
- IMS (valid only on z/OS)
- QMGR
URTYPE identifies the EXTURID type and not the type of the transaction coordinator. When URTYPE is QMGR, the associated identifier is in QMURID (and not EXTURID).
- USERID
- The user identifier associated with the connection.
This parameter is not returned when APPLTYPE has the value SYSTEM.
Handle attributes
- Connection identifier (CONN parameter)
- Read ahead status (DEFREADA parameter)
- Type of information returned (TYPE parameter)
- Handle status (HSTATE)
- Object name (OBJNAME parameter)
- Object type (OBJTYPE parameter)
- ASTATE
- The state of the asynchronous consumer on this object
handle.
Possible values are:
- ACTIVE
- An MQCB call has set up a function to call back to process messages asynchronously and the connection handle has been started so that asynchronous message consumption can proceed.
- INACTIVE
- An MQCB call has set up a function to call back to process messages asynchronously but the connection handle has not yet been started, or has been stopped or suspended, so that asynchronous message consumption cannot currently proceed.
- SUSPENDED
- The asynchronous consumption callback has been suspended so that
asynchronous message consumption cannot currently proceed on this
object handle. This can be either because an MQCB call with Operation
MQOP_SUSPEND has been issued against this object handle by the application,
or because it has been suspended by the system. If it has been suspended
by the system, as part of the process of suspending asynchronous message
consumption the callback function will be called with the reason code
that describes the problem resulting in suspension. This will be reported
in the Reason field in the MQCBC structure that is passed to the callback
function.
For asynchronous message consumption to proceed, the application must issue an MQCB call with the Operation parameter set to MQOP_RESUME.
- SUSPTEMP
- The asynchronous consumption callback has been temporarily suspended
by the system so that asynchronous message consumption cannot currently
proceed on this object handle. As part of the process of suspending
asynchronous message consumption, the callback function will be called
with the reason code that describes the problem resulting in suspension.
This will be reported in the Reason field in the MQCBC structure passed
to the callback function.
The callback function will be called again when asynchronous message consumption is resumed by the system, when the temporary condition has been resolved.
- NONE
- An MQCB call has not been issued against this handle, so no asynchronous message consumption is configured on this handle.
- DEST
- The destination queue for messages that are published to this subscription. This parameter is only relevant for handles of subscriptions to topics. It is not returned for other handles.
- DESTQMGR
- The destination queue manager for messages that are published to this subscription. This parameter is relevant only for handles of subscriptions to topics. It is not returned for other handles. If DEST is a queue that is hosted on the local queue manager, this parameter will contain the local queue manager name. If DEST is a queue that is hosted on a remote queue manager, this parameter will contain the name of the remote queue manager.
- HSTATE
- The state
of the handle. Possible values are:
- ACTIVE
- An API call from this connection is currently in progress for
this object. If the object is a queue, this condition can arise when
an MQGET WAIT call is in progress.
If there is an MQGET SIGNAL outstanding, then this does not mean, by itself, that the handle is active.
- INACTIVE
- No API call from this connection is currently in progress for this object. If the object is a queue, this condition can arise when no MQGET WAIT call is in progress.
- OBJNAME
- The name of an object that the connection has open.
- OBJTYPE
- The type
of the object that the connection has open. If this handle is that
of a subscription to a topic, then the SUBID parameter identifies
the subscription. You can then use the DISPLAY SUB command to find
all the details about the subscription.It is one of the following:
- QUEUE
- PROCESS
- QMGR
- STGCLASS (valid only on z/OS)
- NAMELIST
- CHANNEL
- AUTHINFO
- TOPIC
- OPENOPTS
- The open
options currently in force for the connection for the object. This
parameter is not returned for a subscription. Use the value in the
SUBID parameter and the DISPLAY SUB command to find the details about
the subscription.Possible values are:
- MQOO_INPUT_AS_Q_DEF
- Open queue to get messages using queue-defined default.
- MQOO_INPUT_SHARED
- Open queue to get messages with shared access.
- MQOO_INPUT_EXCLUSIVE
- Open queue to get messages with exclusive access.
- MQOO_BROWSE
- Open queue to browse messages.
- MQOO_OUTPUT
- Open queue or topic to put messages.
- MQOO_INQUIRE
- Open queue to inquire attributes.
- MQOO_SET
- Open queue to set attributes.
- MQOO_BIND_ON_OPEN
- Bind handle to destination when queue is found.
- MQOO_BIND_NOT_FIXED
- Do not bind to a specific destination.
- MQOO_SAVE_ALL_CONTEXT
- Save context when message retrieved.
- MQOO_PASS_IDENTITY_CONTEXT
- Allow identity context to be passed.
- MQOO_PASS_ALL_CONTEXT
- Allow all context to be passed.
- MQOO_SET_IDENTITY_CONTEXT
- Allow identity context to be set.
- MQOO_SET_ALL_CONTEXT
- Allow all context to be set.
- MQOO_ALTERNATE_USER_AUTHORITY
- Validate with specified user identifier.
- MQOO_FAIL_IF_QUIESCING
- Fail if queue manager is quiescing.
- QSGDISP
- Indicates
the disposition of the object. It is valid on z/OS only. The value is one of the following:
- QMGR
- The object was defined with QSGDISP(QMGR).
- COPY
- The object was defined with QSGDISP(COPY).
- SHARED
- The object was defined with QSGDISP(SHARED).
You cannot use QSGDISP as a filter keyword.
- READA
- The read ahead
connection status. Possible values are:
- NO
- Read ahead of non-persistent messages is not enabled for this object.
- YES
- Read ahead of non-persistent message is enabled for this object and is being used efficiently.
- BACKLOG
- Read ahead of non-persistent messages is enabled for this object. Read ahead is not being used efficiently because the client has been sent a large number of messages which are not being consumed.
- INHIBITED
- Read ahead was requested by the application but has been inhibited because of incompatible options specified on the first MQGET call.
- SUBID
- The internal,
all-time unique identifier of the subscription. This parameter is
relevant only for handles of subscriptions to topics. It is not returned
for other handles.
Not all subscriptions show up in DISPLAY CONN; only those that have current handles open to the subscription show up. You can use the DISPLAY SUB command to see all subscriptions.
- SUBNAME
- The application's unique subscription name that is associated with the handle. This parameter is relevant only for handles of subscriptions to topics. It is not returned for other handles. Not all subscriptions will have a subscription name.
- TOPICSTR
- The resolved topic string. This parameter is relevant for handles with OBJTYPE(TOPIC). For any other object type, this parameter is not returned.
Full attributes
If TYPE is set to *, or ALL, both Connection attributes and Handle attributes are returned for each connection that satisfies the selection criteria.