On the vSRX platform, Network impact can be noticed multiple times due to FPC going into an offline state and generating "srxpfe.core".
Below dpdk logs can be seen in the backtrace.
#0 strchr (p=0x0, ch=118) at /volume/build/junos/occam/llvm-10.0/sandbox-224-20230321-be5f9c0/freebsd/stable_12_224/20230321.081955_builder_stable_12_224.be5f9c0/src/lib/libc/string/strchr.c:48
#1 0x0000000012ccee3f in strstr (h=0x0, n=0x54b998 "vf") at /volume/build/junos/occam/llvm-10.0/sandbox-224-20230321-be5f9c0/freebsd/stable_12_224/20230321.081955_builder_stable_12_224.be5f9c0/src/lib/libc/string/strstr.c:179
#2 0x00000000022a9775 in tvp_drv_dpdk_is_sriov_vf (port_id=<optimized out>) at ../../../../../../../../src/pfe/common/drivers/dpdk/dpdk.c:367
#3 tvp_drv_dpdk_get_link_status (port_id=0 '\000', link_status=0x2033603b "\001") at ../../../../../../../../src/pfe/common/drivers/dpdk/dpdk.c:468
#4 0x00000000022a99a2 in tvp_drv_dpdk_link_status (port_id=0 '\000', link_status=0x2033603b "\001") at ../../../../../../../../src/pfe/common/drivers/dpdk/dpdk.c:530
#5 0x00000000022548ca in dpdk_eth_link_state (pid=<optimized out>, link_up=<optimized out>) at ../../../../../../../../src/pfe/common/drivers/dpdk-tvp/dpdk_drv.c:352
#6 dpdk_eth_getinfo (pid=<optimized out>, cmd=<optimized out>, info_msg=0x20336078) at ../../../../../../../../src/pfe/common/drivers/dpdk-tvp/dpdk_drv.c:447
#7 0x000000000193b30d in eth_linkstate_ok (eth=0x21fa7200) at ../../../../../../../../src/pfe/common/toolkits/eth/eth_ifd.c:87
#8 eth_ifd_periodic (eth=0x21fa7200) at ../../../../../../../../src/pfe/common/toolkits/eth/eth_ifd.c:475
#9 0x000000000193acb7 in eth_periodic (timer=<optimized out>) at ../../../../../../../../src/pfe/common/toolkits/eth/eth.c:140
#10 eth_thread_loop () at ../../../../../../../../src/pfe/common/toolkits/eth/eth.c:239
#11 0x000000000144d8a0 in ?? () at ../../../../../../../src/pfe/ukern/common/thread.c:623
#12 0x0000000000000000 in ?? ()
On Azure/hyper-V platform, if vSRX is running with the Junos version 22.4R2 then FPC can go into an offline state and generate core-dumps "srxpfe.core".
This issue is resolved in the below versions.
junos:22.4R3
junos:22.4R3-S2
junos:23.1R2
junos:23.2R2
junos:23.3R2
junos:23.4R1
junos:24.1R1