IMPDP Hangs – Waiting for Unread Message on Broadcast Channel

If IMPDP hangs, and if checking in v$sessionwait shows it is waiting on “wait for unread message on broadcast channel”, check the alert log. You may see something like:

statement in resumable session ‘SYSTEM.SCHEMAIMPORT.1′ was suspended due to
ORA-01658: unable to create INITIAL extent for segment in tablespace TS_DATA

Tablespace is full in other words, and will need to be extended for the IMPDP to continue.

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One Response to IMPDP Hangs – Waiting for Unread Message on Broadcast Channel

  1. Amol says:

    The datapump master session waits on “wait for unread message on broadcast channel”, you should check the datapump worker’s session.

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