This article outlines a potential solution to an issue where Security Director fails with the following error message while updating IPS signatures in an SRX cluster:

"Error encountered while installing signatures on the device - Failed to push files to node1."

The IDP signature installation failed while transferring the final streaming chunk (LastChunkInStream) of the file SignatureUpdate.xml.gz to node1
The failure occurs specifically during the endStreamingReq() operation, when SD sends the closing </file-put> RPC to the device, then the device responds with a Status: Failure, indicating that it was unable to complete the streaming session successfully.

Relevant log found in /var/log/jboss/servers/server1/SD.log:
2026-02-27 15:38:10,276 ERROR [net.juniper.jnap.sm.idp.utils.installHandler.JunosInstallHandler] (JobThread1020180, Parent JobThread1020179) Response from device Status: Failure, ResultMessage: Ending Streaming Request Results
Failed to finish streaming data devId=83
Failed to streaming data
 rpc-reply: 
2026-02-27 15:38:40,299 ERROR [net.juniper.jnap.sm.idp.ejb.IDPDeviceInstallManagerBean] (JobThread1020180, Parent JobThread1020179) Error encountered while Install Signature for device:firewall: net.juniper.jmp.exception.JMPException: Push files to device failed for node node1
    at net.juniper.jnap.sm.idp.utils.installHandler.JunosInstallHandler.sendFileDataToDevice(JunosInstallHandler.java:835) [idpmanager.jar:]
    at net.juniper.jnap.sm.idp.utils.installHandler.JunosInstallHandler.pushFile(JunosInstallHandler.java:746) [idpmanager.jar:]
    at net.juniper.jnap.sm.idp.utils.installHandler.JunosInstallHandler.filePushWithRetry(JunosInstallHandler.java:275) [idpmanager.jar:]
    at net.juniper.jnap.sm.idp.utils.installHandler.JunosInstallHandler.runInstallProcess(JunosInstallHandler.java:225) [idpmanager.jar:]

Users running Security Director versions earlier than 26.1R1 who encounter the installation error shown below can upgrade to Security Director 26.1R1. 

This release includes a retry mechanism designed to help address IPS signature installation failures.

"Error encountered while installing signatures on the device - Failed to push files to node1."

You may also want to review KB109040 [juniper.net]

Related Information:

• Upgrading Junos Space Network Management Platform
• Upgrading a Junos Space Application
• Junos Space Platform Release Note 26.1
• Junos Space Security Director Release Notes 26.1