Below steps would cause the FPC0 to go offline and generate an srxpfe corecump.

1. Disable 4 out of 5 interfaces

2. Commit and-quit

3. Rollback 1

4. Commit and-quit

5.  show security flow session destination-prefix <prefix>

##############. More details of steps - ##################

root@testbed> edit

Entering configuration mode

[edit]

root@testbed# rollback 1

load complete

[edit]

root@testbed# show | compare

[edit interfaces ge-0/0/1]

- disable;

[edit interfaces ge-0/0/2]

- disable;

[edit interfaces ge-0/0/3]

- disable;

[edit interfaces ge-0/0/4]

- disable;

[edit]

root@testbed# commit and-quit

commit complete

Exiting configuration mode

root@testbed> show security flow session destination-prefix <prefix> | refresh 2

---(refreshed at 2025-06-18 21:51:31 UTC)---

Total sessions: 0

---(refreshed at 2025-06-18 21:51:33 UTC)---

error: usp_ipc_client_recv_:ipc_pipe_read() failed read timed out after 5 second(s)

---(refreshed at 2025-06-18 21:51:41 UTC)---

error: usp_ipc_client_recv_:ipc_pipe_read() failed read timed out after 5 second(s)

---(refreshed at 2025-06-18 21:51:49 UTC)---

error: usp_ipc_client_recv_:ipc_pipe_read() failed read timed out after 5 second(s)

---(refreshed at 2025-06-18 21:51:57 UTC)---

^C[abort]

root@testbed> show chassis fpc

Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%)

Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer

0 Online -------------------- CPU less FPC --------------------

root@testbed> show security flow session destination-prefix <prefix> | refresh 2

---(refreshed at 2025-06-18 21:52:19 UTC)---

error: usp_ipc_client_recv_ 1250: ipc_pipe_read fails! error:Connection reset by peer(54), tries:1

---(refreshed at 2025-06-18 21:52:21 UTC)---

root@testbed> show chassis fpc pic-status

Slot 0 Offline FPC

root@testbed> show chassis fpc pic-status

Slot 0 Online FPC

PIC 0 Ready

root@testbed> show system core-dumps

/var/crash\/*core*: No such file or directory

-rw------- 1 root wheel 161646347 Jun 17 21:37 /var/tmp/srxpfe.core.0.gz

-rw------- 1 root wheel 134938618 Jun 18 21:52 /var/tmp/srxpfe.core.1.gz

/var/tmp/pics\/*core*: No such file or directory

/var/crash/kernel.*: No such file or directory

/var/jails/rest-api/tmp\/*core*: No such file or directory

/tftpboot/corefiles\/*core*: No such file or directory

total files: 2

Core/crash

After the interfaces are enabled, wait for the interfaces to come up before running the "show security flow session destination-prefix <prefix>" command.

This issue has been fixed in PR :1874848 in the following releases.

junos:24.2R2-S1 junos:24.4R2 junos:25.2R1 junos:25.3R1