Vol mount failed - iscsi: error logging in target: exit status 15

[sunnygupta1218]

Issue description:
On rebooting node, pod with pvc comes in unknown state and throws following error:

Pod describe o/p:

Events:
  Type     Reason       Age                   From     Message
  ----     ------       ----                  ----     -------
  Warning  FailedMount  4m1s (x659 over 22h)  kubelet  MountVolume.MountDevice failed for volume "csi-b4786769-b306-40ac-9726-dc7aa313b780" : rpc error: code = Internal desc = iscsi: error logging in target: exit status 15

Environment details

CSI release =v1.33.0
K8 version = v1.35.0
OS release = "Ubuntu 24.04.3 LTS"

CSI Node error:

2026-02-06T10:34:54.428Z        ERROR   BV      driver/bv_node.go:192   failed to log into the iSCSI target.    {"volumeID": "ocid1.volume.oc1.eu-frankfurt-1.abtheljtbgocla7izk7phwdg3gjimtytpchwyr4chq24ukg7eyhsgca4baza", "stagingPath": "/var/lib/kubelet/plugins/kubernetes.io/csi/blockvolume.csi.oraclecloud.com/325b1e64dcdccc7ca1e75974ac73df635f1b000889017e241b8d8cdd7ba3e7cf/globalmount", "error": "iscsi: error logging in target: exit status 15"}
2026-02-06T10:34:54.428Z        ERROR   BV      driver/driver.go:352    Failed to process gRPC request. {"error": "rpc error: code = Internal desc = iscsi: error logging in target: exit status 15", "method": "/csi.v1.Node/NodeStageVolume", "request": "{\"publish_context\":{\"attachment-type\":\"iscsi\",\"device\":\"/dev/oracleoci/oraclevdb\",\"iscci_iqn\":\"iqn.2015-12.com.oracleiaas:274e11de-bd7c-437f-a439-e9b4f6de6909\",\"iscsi_ip\":\"169.254.2.3\",\"iscsi_port\":\"3260\",\"multipathDevices\":\"\",\"multipathEnabled\":\"false\",\"needResize\":\"false\",\"newSize\":\"\",\"vpusPerGB\":\"10\"},\"staging_target_path\":\"/var/lib/kubelet/plugins/kubernetes.io/csi/blockvolume.csi.oraclecloud.com/325b1e64dcdccc7ca1e75974ac73df635f1b000889017e241b8d8cdd7ba3e7cf/globalmount\",\"volume_capability\":{\"access_mode\":{\"mode\":\"SINGLE_NODE_WRITER\"},\"mount\":{}},\"volume_context\":{\"attachment-type\":\"\",\"needResize\":\"false\",\"newSize\":\"\",\"storage.kubernetes.io/csiProvisionerIdentity\":\"1770228548244-4488-blockvolume.csi.oraclecloud.com\",\"vpusPerGB\":\"10\"},\"volume_id\":\"ocid1.volume.oc1.eu-frankfurt-1.abtheljtbgocla7izk7phwdg3gjimtytpchwyr4chq24ukg7eyhsgca4baza\"}"}
2026-02-06T10:34:57.802Z        INFO    FSS     driver/driver.go:354    gRPC response is sent successfully.     {"method": "/csi.v1.Node/NodeGetCapabilities", "response": "{\"capabilities\":[{\"rpc\":{\"type\":\"STAGE_UNSTAGE_VOLUME\"}}]}"}
2026-02-06T10:34:57.803Z        INFO    FSS     driver/driver.go:354    gRPC response is sent successfully.     {"method": "/csi.v1.Node/NodeGetCapabilities", "response": "{\"capabilities\":[{\"rpc\":{\"type\":\"STAGE_UNSTAGE_VOLUME\"}}]}"}
2026-02-06T10:34:57.804Z        INFO    FSS     driver/driver.go:354    gRPC response is sent successfully.     {"method": "/csi.v1.Node/NodeGetCapabilities", "response": "{\"capabilities\":[{\"rpc\":{\"type\":\"STAGE_UNSTAGE_VOLUME\"}}]}"}
2026-02-06T10:34:57.806Z        DEBUG   FSS     driver/fss_node.go:62   volumeHandler :  &{ocid1.filesystem.oc1.eu_frankfurt_1.aaaaaaaaaandin3ymzzgcllqojxwiotfouwwm4tbnzvwm5lsoqwtcllbmqwtgaaa 10.0.0.8 /csi-fss-083e7b39-9f3d-469f-8f59-68f96c25e5b8}  {"volumeID": "ocid1.filesystem.oc1.eu_frankfurt_1.aaaaaaaaaandin3ymzzgcllqojxwiotfouwwm4tbnzvwm5lsoqwtcllbmqwtgaaa:10.0.0.8:/csi-fss-083e7b39-9f3d-469f-8f59-68f96c25e5b8"}
2026-02-06T10:34:57.806Z        DEBUG   FSS     driver/fss_node.go:78   volume context: map[encryptInTransit:false storage.kubernetes.io/csiProvisionerIdentity:1770275984752-42-fss.csi.oraclecloud.com]       {"volumeID": "ocid1.filesystem.oc1.eu_frankfurt_1.aaaaaaaaaandin3ymzzgcllqojxwiotfouwwm4tbnzvwm5lsoqwtcllbmqwtgaaa:10.0.0.8:/csi-fss-083e7b39-9f3d-469f-8f59-68f96c25e5b8"}
2026-02-06T10:34:57.816Z        DEBUG   FSS     driver/fss_node.go:130  Trying to stage.        {"volumeID": "ocid1.filesystem.oc1.eu_frankfurt_1.aaaaaaaaaandin3ymzzgcllqojxwiotfouwwm4tbnzvwm5lsoqwtcllbmqwtgaaa:10.0.0.8:/csi-fss-083e7b39-9f3d-469f-8f59-68f96c25e5b8"}
2026-02-06T10:34:57.816Z        INFO    FSS     driver/fss_node.go:149  Stage started.  {"volumeID": "ocid1.filesystem.oc1.eu_frankfurt_1.aaaaaaaaaandin3ymzzgcllqojxwiotfouwwm4tbnzvwm5lsoqwtcllbmqwtgaaa:10.0.0.8:/csi-fss-083e7b39-9f3d-469f-8f59-68f96c25e5b8"}
--

At OS layer, it seems the device is already logged in however CSI Driver also tried to do and fails

ubuntu@instance-20260202-1239:/var/log$ sudo iscsiadm -m session 
tcp: [1] 169.254.0.2:3260,1 iqn.2015-02.oracle.boot:uefi (non-flash)
tcp: [2] 169.254.2.3:3260,1 iqn.2015-12.com.oracleiaas:274e11de-bd7c-437f-a439-e9b4f6de6909 (non-flash)

If I logout from session using iscsiadm command at OS layer and restart the pod, then volume is mounted successfully. This manual workaround is not feasible for production environment.

csi-oci-node.tar.gz