}
	}
	if errors.Is(err, grid.ErrDisconnected) {
		return true
	}
	// More corner cases suitable for storage REST API
	switch {
	// A peer node can be in shut down phase and proactively
	// return 503 server closed error, consider it as an offline node
	case strings.Contains(err.Error(), http.ErrServerClosed.Error()):
		return true
	// Corner case, the server closed the connection with a keep-alive timeout

	SYS_FSTATVFS               = 501 // { int fstatvfs(int fd, struct statvfs *buf); }
	SYS_FHSTATVFS              = 502 // { int fhstatvfs(const struct fhandle *u_fhp, struct statvfs *buf); }
	SYS_GETVFSSTAT             = 503 // { int getvfsstat(struct statfs *buf,          struct statvfs *vbuf, long vbufsize, int flags); }
	SYS_OPENAT                 = 504 // { int openat(int fd, char *path, int flags, int mode); }

            super(displayName)
        }

        @Override
        void handle(HttpServletRequest request, HttpServletResponse response) {
            response.sendError(503, "service unavailable")
        }
    }

    class SendFileAction extends ActionSupport {
        private final String path
        private final File srcFile
        private final boolean revalidate

	mnMNIndex         ID = 497
	moIndex           ID = 498
	mrIndex           ID = 499
	mrINIndex         ID = 500
	msIndex           ID = 501
	msBNIndex         ID = 502
	msMYIndex         ID = 503
	msSGIndex         ID = 504
	mtIndex           ID = 505
	mtMTIndex         ID = 506
	muaIndex          ID = 507
	muaCMIndex        ID = 508
	myIndex           ID = 509
	myMMIndex         ID = 510

  integrity sha512-TPJXq8JqFaVYm2CWmPvnP2Iyo4ZSM7/QKcSmuMLDObfpH5fi7RUGmd/rTDf+rut/saiDiQEeVTNgAmJEdAOx0w==

engine.io-parser@~5.0.3:
  version "5.0.4"
  resolved "https://registry.yarnpkg.com/engine.io-parser/-/engine.io-parser-5.0.4.tgz#0b13f704fa9271b3ec4f33112410d8f3f41d0fc0"

	SYS_RENAMEAT                 = 501 // { int renameat(int oldfd, char *old, int newfd, char *new); }
	SYS_SYMLINKAT                = 502 // { int symlinkat(char *path1, int fd, char *path2); }
	SYS_UNLINKAT                 = 503 // { int unlinkat(int fd, char *path, int flag); }
	SYS_POSIX_OPENPT             = 504 // { int posix_openpt(int flags); }
	SYS_GSSD_SYSCALL             = 505 // { int gssd_syscall(char *path); }

	SYS_RENAMEAT                 = 501 // { int renameat(int oldfd, char *old, int newfd, char *new); }
	SYS_SYMLINKAT                = 502 // { int symlinkat(char *path1, int fd, char *path2); }
	SYS_UNLINKAT                 = 503 // { int unlinkat(int fd, char *path, int flag); }
	SYS_POSIX_OPENPT             = 504 // { int posix_openpt(int flags); }
	SYS_GSSD_SYSCALL             = 505 // { int gssd_syscall(char *path); }

	SYS_RENAMEAT                 = 501 // { int renameat(int oldfd, char *old, int newfd, char *new); }
	SYS_SYMLINKAT                = 502 // { int symlinkat(char *path1, int fd, char *path2); }
	SYS_UNLINKAT                 = 503 // { int unlinkat(int fd, char *path, int flag); }
	SYS_POSIX_OPENPT             = 504 // { int posix_openpt(int flags); }
	SYS_GSSD_SYSCALL             = 505 // { int gssd_syscall(char *path); }

	SYS_RENAMEAT                 = 501 // { int renameat(int oldfd, char *old, int newfd, char *new); }
	SYS_SYMLINKAT                = 502 // { int symlinkat(char *path1, int fd, char *path2); }
	SYS_UNLINKAT                 = 503 // { int unlinkat(int fd, char *path, int flag); }
	SYS_POSIX_OPENPT             = 504 // { int posix_openpt(int flags); }
	SYS_GSSD_SYSCALL             = 505 // { int gssd_syscall(char *path); }

	SYS_RENAMEAT                 = 501 // { int renameat(int oldfd, char *old, int newfd, char *new); }
	SYS_SYMLINKAT                = 502 // { int symlinkat(char *path1, int fd, char *path2); }
	SYS_UNLINKAT                 = 503 // { int unlinkat(int fd, char *path, int flag); }
	SYS_POSIX_OPENPT             = 504 // { int posix_openpt(int flags); }
	SYS_GSSD_SYSCALL             = 505 // { int gssd_syscall(char *path); }